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

MedKoo CAT#: 202540

CAS#: 91421-42-0

Description: Rubitecan is a semisynthetic agent related to camptothecin with potent antitumor and antiviral properties. Rubitecan binds to and inhibits the enzyme topoisomerase I and induces protein-linked DNA single-strand breaks, thereby blocking DNA and RNA synthesis in dividing cells; this agent also prevents repair of reversible single-strand DNA breaks.

Chemical Structure

CAS# 91421-42-0

Theoretical Analysis

MedKoo Cat#: 202540
Name: Rubitecan
CAS#: 91421-42-0
Chemical Formula: C20H15N3O6
Exact Mass: 393.09609
Molecular Weight: 393.35
Elemental Analysis: C, 61.07; H, 3.84; N, 10.68; O, 24.40

Price and Availability

Size Price Availability Quantity
10.0mg USD 190.0 2 Weeks
50.0mg USD 400.0 2 Weeks
100.0mg USD 730.0 2 Weeks
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Synonym: RFS 2000; RFS-2000; RFS2000; Abbreviation: 9NC. 9-nitro-camptothecin; 9-nitro-CPT; nitrocamptothecin. US brand names: Camptogen; Orathecin.

IUPAC/Chemical Name: (S)-4-ethyl-4-hydroxy-10-nitro-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione


InChi Code: InChI=1S/C20H15N3O6/c1-2-20(26)13-7-16-17-10(8-22(16)18(24)12(13)9-29-19(20)25)6-11-14(21-17)4-3-5-15(11)23(27)28/h3-7,26H,2,8-9H2,1H3/t20-/m0/s1

SMILES Code: O=C1[C@](O)(CC)C2=C(CO1)C(N3CC4=CC5=C([N+]([O-])=O)C=CC=C5N=C4C3=C2)=O

Appearance: 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 soluble in water.

Shelf Life: >5 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 393.35 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: Caponigro F, Cartenì G, Droz JP, Milano A, Davis WB, Pollard P. Phase II study of rubitecan in recurrent or metastatic head and neck cancer. Cancer Chemother Pharmacol. 2008 Jul;62(2):209-14. Epub 2007 Sep 19. PubMed PMID: 17882418.

2: Patel H, Stoller R, Auber M, Potter D, Cai C, Zamboni W, Kiefer G, Matin K, Schmotzer A, Ramanathan RK. Phase II study of rubitecan, an oral camptothecin in patients with advanced colorectal cancer who have failed previous 5-fluorouracil based chemotherapy. Invest New Drugs. 2006 Jul;24(4):359-63. PubMed PMID: 16525767.

3: Clark JW. Rubitecan. Expert Opin Investig Drugs. 2006 Jan;15(1):71-9. Review. PubMed PMID: 16370935.

4: Chedid S, Rivera E, Frye DK, Ibrahim N, Esteva F, Valero V, Hortobagyi G, Mettinger KL, Cristofanilli M. Minimal clinical benefit of single agent Orathecin (Rubitecan) in heavily pretreated metastatic breast cancer. Cancer Chemother Pharmacol. 2006 Apr;57(4):540-4. Epub 2005 Sep 29. PubMed PMID: 16193332.

5: Baka S, Ranson M, Lorigan P, Danson S, Linton K, Hoogendam I, Mettinger K, Thatcher N. A phase II trial with RFS2000 (rubitecan) in patients with advanced non-small cell lung cancer. Eur J Cancer. 2005 Jul;41(11):1547-50. PubMed PMID: 16026691.

6: Burris HA 3rd, Rivkin S, Reynolds R, Harris J, Wax A, Gerstein H, Mettinger KL, Staddon A. Phase II trial of oral rubitecan in previously treated pancreatic cancer patients. Oncologist. 2005 Mar;10(3):183-90. PubMed PMID: 15793221.

7: Rubitecan: 9-NC, 9-Nitro-20(S)-camptothecin, 9-nitro-camptothecin, 9-nitrocamptothecin, RFS 2000, RFS2000. Drugs R D. 2004;5(5):305-11. PubMed PMID: 15357630.

8: Schoemaker NE, Mathôt RA, Schöffski P, Rosing H, Schellens JH, Beijnen JH. Development of an optimal pharmacokinetic sampling schedule for rubitecan administered orally in a daily times five schedule. Cancer Chemother Pharmacol. 2002 Dec;50(6):514-7. Epub 2002 Nov 5. PubMed PMID: 12451480.

9: Fracasso PM, Rader JS, Govindan R, Herzog TJ, Arquette MA, Denes A, Mutch DG, Picus J, Tan BR, Fears CL, Goodner SA, Sun SL. Phase I study of rubitecan and gemcitabine in patients with advanced malignancies. Ann Oncol. 2002 Nov;13(11):1819-25. PubMed PMID: 12419757.

10: Sands H, Mishra A, Stoeckler JD, Hollister B, Chen SF. Preclinical activity of an i.v. formulation of rubitecan in IDD-P against human solid tumor xenografts. Anticancer Drugs. 2002 Oct;13(9):965-75. PubMed PMID: 12394260.

11: Schöffski P, Herr A, Vermorken JB, Van den Brande J, Beijnen JH, Rosing H, Volk J, Ganser A, Adank S, Botma HJ, Wanders J. Clinical phase II study and pharmacological evaluation of rubitecan in non-pretreated patients with metastatic colorectal cancer-significant effect of food intake on the bioavailability of the oral camptothecin analogue. Eur J Cancer. 2002 Apr;38(6):807-13. PubMed PMID: 11937315.

12: Giovanella BC, Stehlin JS, Hinz HR, Kozielski AJ, Harris NJ, Vardeman DM. Preclinical evaluation of the anticancer activity and toxicity of 9-nitro-20(S)-camptothecin (Rubitecan). Int J Oncol. 2002 Jan;20(1):81-8. PubMed PMID: 11743646.

13: Kemp KR, Liehr JG, Giovanella B. Combined radiation and 9-nitrocamptothecin (rubitecan) in the treatment of locally advanced pancreatic cancer. Ann N Y Acad Sci. 2000;922:320-3. PubMed PMID: 11193912.

Additional Information

According to BioSpace, EuroGen Pharmaceuticals Ltd. has withdrawn its Marketing Authorisation Application for Orathecin™ (rubitecan), following discussions with the EMEA. Orathecin is a topoisomerase I inhibitor under development for the treatment of pancreatic cancer in patients who have failed at least one prior chemotherapy regimen. According to a press release from the EMEA, the Committee for Medicinal Products for Human Use (CHMP) reviewed Phase III data submitted as part of the application and did not consider it to be sufficient to demonstrate a clinical benefit for patients receiving Orathecin. The Company could not address the issues raised at this stage and therefore withdrew the application. Orathecin has orphan drug status in both the US and the EU. An ongoing US Phase II trial is looking at a combination of Orathecin and gemcitabine as a first-line combination therapy for advanced pancreatic cancer patients who are chemotherapy naive. See: .