WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 406280

CAS#: 86639-52-3

Description: SN-38 is the active metabolite of irinotecan (an analog of camptothecin - a topoisomerase I inhibitor); it is 1000 times more active than irinotecan itself. In vitro cytotoxicity assays show that the potency of SN-38 relative to irinotecan varies from 2- to 2000-fold. SN38 is metabolized via glucoronidation by UGT1A1. The variant of UGT1A1 in ~10% of Caucasians which leads to poor metabolization of irinotecan predicts irinotecan toxicity, as it cannot be excreted from the body in its SN-38 form. SN-38 is lost into the bile and feces. It can cause the symptoms of diarrhoea and myelosuppression experienced by ~25% of the patients administered irinotecan.

Chemical Structure

CAS# 86639-52-3

Theoretical Analysis

MedKoo Cat#: 406280
Name: SN-38
CAS#: 86639-52-3
Chemical Formula: C22H20N2O5
Exact Mass: 392.13722
Molecular Weight: 392.4
Elemental Analysis: C, 67.34; H, 5.14; N, 7.14; O, 20.39

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Synonym: SN38; SN-38; SN 38; 10-hydroxy-7-ethylcamptothecin; irinotecan metabolite.

IUPAC/Chemical Name: (S)-4,11-diethyl-4,9-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione


InChi Code: InChI=1S/C22H20N2O5/c1-3-12-13-7-11(25)5-6-17(13)23-19-14(12)9-24-18(19)8-16-15(20(24)26)10-29-21(27)22(16,28)4-2/h5-8,25,28H,3-4,9-10H2,1-2H3/t22-/m0/s1

SMILES Code: O=C1[C@](O)(CC)C2=C(CO1)C(N3CC4=C(CC)C5=CC(O)=CC=C5N=C4C3=C2)=O

Appearance: Light yellow solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 392.4 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Buck A, Halbritter S, Späth C, Feuchtinger A, Aichler M, Zitzelsberger H, Janssen KP, Walch A. Distribution and quantification of irinotecan and its active metabolite SN-38 in colon cancer murine model systems using MALDI MSI. Anal Bioanal Chem. 2014 Oct 14. [Epub ahead of print] PubMed PMID: 25311193.

2: Yang FY, Zhang WP, Wang XY, Yang WC, Dang HW. [Pharmacokinetics of SN-38 in rats and tissue distribution of 7-ethyl-10-hydroxycamptothecin in mice after intravenous injection of irinotecan hydrochloride nanoparticles]. Yao Xue Xue Bao. 2014 Jul;49(7):1029-33. Chinese. PubMed PMID: 25233635.

3: Minami K, Kamijo Y, Nishizawa Y, Tabata S, Horikuchi F, Yamamoto M, Kawahara K, Shinsato Y, Tachiwada T, Chen ZS, Tsujikawa K, Nakagawa M, Seki N, Akiyama S, Arima K, Takeda Y, Furukawa T. Expression of ABCB6 is related to resistance to 5-FU, SN-38 and vincristine. Anticancer Res. 2014 Sep;34(9):4767-73. PubMed PMID: 25202056.

4: Ghazaly E, Perry J, Kitromilidou C, Powles T, Joel S. Development and validation of an ultra-high performance LC-MS/MS assay for intracellular SN-38 in human solid tumour cell lines: comparison with a validated HPLC-fluorescence method. J Chromatogr B Analyt Technol Biomed Life Sci. 2014 Oct 15;969:213-8. doi: 10.1016/j.jchromb.2014.08.024. Epub 2014 Aug 27. PubMed PMID: 25195021.

5: Hu T, Chung YM, Guan M, Ma M, Ma J, Berek JS, Hu MC. Reprogramming ovarian and breast cancer cells into non-cancerous cells by low-dose metformin or SN-38 through FOXO3 activation. Sci Rep. 2014 Jul 24;4:5810. doi: 10.1038/srep05810. PubMed PMID: 25056111; PubMed Central PMCID: PMC4108946.

6: Nittayacharn P, Manaspon C, Hongeng S, Nasongkla N. HPLC analysis and extraction method of SN-38 in brain tumor model after injected by polymeric drug delivery system. Exp Biol Med (Maywood). 2014 Jul 2. pii: 1535370214539227. [Epub ahead of print] PubMed PMID: 24990485.

7: Park DJ, Won JH, Cho AR, Yun HJ, Heo JH, Hwhang TH, Lee DH, Kim WM. Determination of irinotecan and its metabolite SN-38 in rabbit plasma and tumors using a validated method of tandem mass spectrometry coupled with liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci. 2014 Jul 1;962:147-52. doi: 10.1016/j.jchromb.2014.05.042. Epub 2014 May 27. PubMed PMID: 24927278.

8: Wang H, Bian T, Jin T, Chen Y, Lin A, Chen C. Association analysis of UGT1A genotype and haplotype with SN-38 glucuronidation in human livers. Pharmacogenomics. 2014 Apr;15(6):785-98. doi: 10.2217/pgs.14.29. PubMed PMID: 24897286.

9: Yu J, Han JC, Gao YJ. Biotransformation of Glucoaurantio-Obtusin Towards Aurantio-Obtusin Increases the Toxicity of Irinotecan Through Increased Inhibition Towards SN-38 Glucuronidation. Phytother Res. 2014 Oct;28(10):1577-80. doi: 10.1002/ptr.5162. Epub 2014 May 19. PubMed PMID: 24842785.

10: Chu C, Abbara C, Tandia M, Polrot M, Gonin P, Farinotti R, Bonhomme-Faivre L. Cetuximab increases concentrations of irinotecan and of its active metabolite SN-38 in plasma and tumour of human colorectal carcinoma-bearing mice. Fundam Clin Pharmacol. 2014 Mar 3. doi: 10.1111/fcp.12071. [Epub ahead of print] PubMed PMID: 24588516.

11: Tahara M, Inoue T, Sato F, Miyakura Y, Horie H, Yasuda Y, Fujii H, Kotake K, Sugano K. The use of Olaparib (AZD2281) potentiates SN-38 cytotoxicity in colon cancer cells by indirect inhibition of Rad51-mediated repair of DNA double-strand breaks. Mol Cancer Ther. 2014 May;13(5):1170-80. doi: 10.1158/1535-7163.MCT-13-0683. Epub 2014 Feb 27. PubMed PMID: 24577941.

12: Santi DV, Schneider EL, Ashley GW. Macromolecular prodrug that provides the irinotecan (CPT-11) active-metabolite SN-38 with ultralong half-life, low C(max), and low glucuronide formation. J Med Chem. 2014 Mar 27;57(6):2303-14. doi: 10.1021/jm401644v. Epub 2014 Mar 6. PubMed PMID: 24494988.

13: Yanagihara K, Takigahira M, Kubo T, Ochiya T, Hamaguchi T, Matsumura Y. Marked antitumor effect of NK012, a SN-38-incorporating micelle formulation, in a newly developed mouse model of liver metastasis resulting from gastric cancer. Ther Deliv. 2014 Feb;5(2):129-38. doi: 10.4155/tde.13.143. PubMed PMID: 24483192.

14: Vangara KK, Ali HI, Lu D, Liu JL, Kolluru S, Palakurthi S. SN-38-cyclodextrin complexation and its influence on the solubility, stability, and in vitro anticancer activity against ovarian cancer. AAPS PharmSciTech. 2014 Apr;15(2):472-82. doi: 10.1208/s12249-013-0068-5. Epub 2014 Jan 30. PubMed PMID: 24477982; PubMed Central PMCID: PMC3969487.

15: Jeong W, Park SR, Rapisarda A, Fer N, Kinders RJ, Chen A, Melillo G, Turkbey B, Steinberg SM, Choyke P, Doroshow JH, Kummar S. Weekly EZN-2208 (PEGylated SN-38) in combination with bevacizumab in patients with refractory solid tumors. Invest New Drugs. 2014 Apr;32(2):340-6. doi: 10.1007/s10637-013-0048-3. Epub 2013 Nov 16. PubMed PMID: 24242862.

16: Iusuf D, Ludwig M, Elbatsh A, van Esch A, van de Steeg E, Wagenaar E, van der Valk M, Lin F, van Tellingen O, Schinkel AH. OATP1A/1B transporters affect irinotecan and SN-38 pharmacokinetics and carboxylesterase expression in knockout and humanized transgenic mice. Mol Cancer Ther. 2014 Feb;13(2):492-503. doi: 10.1158/1535-7163.MCT-13-0541. Epub 2013 Nov 5. PubMed PMID: 24194565.

17: Garrett CR, Bekaii-Saab TS, Ryan T, Fisher GA, Clive S, Kavan P, Shacham-Shmueli E, Buchbinder A, Goldberg RM. Randomized phase 2 study of pegylated SN-38 (EZN-2208) or irinotecan plus cetuximab in patients with advanced colorectal cancer. Cancer. 2013 Dec 15;119(24):4223-30. doi: 10.1002/cncr.28358. Epub 2013 Sep 16. PubMed PMID: 24105075.

18: Satoh T, Yasui H, Muro K, Komatsu Y, Sameshima S, Yamaguchi K, Sugihara K. Pharmacokinetic assessment of irinotecan, SN-38, and SN-38-glucuronide: a substudy of the FIRIS study. Anticancer Res. 2013 Sep;33(9):3845-53. PubMed PMID: 24023318.

19: Lee PC, Chiou YC, Wong JM, Peng CL, Shieh MJ. Targeting colorectal cancer cells with single-walled carbon nanotubes conjugated to anticancer agent SN-38 and EGFR antibody. Biomaterials. 2013 Nov;34(34):8756-65. doi: 10.1016/j.biomaterials.2013.07.067. Epub 2013 Aug 12. PubMed PMID: 23937913.

20: Fujita K, Sugiura T, Okumura H, Umeda S, Nakamichi N, Watanabe Y, Suzuki H, Sunakawa Y, Shimada K, Kawara K, Sasaki Y, Kato Y. Direct inhibition and down-regulation by uremic plasma components of hepatic uptake transporter for SN-38, an active metabolite of irinotecan, in humans. Pharm Res. 2014 Jan;31(1):204-15. doi: 10.1007/s11095-013-1153-x. Epub 2013 Aug 7. PubMed PMID: 23921491.


100.0mg / USD 90.0

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