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

MedKoo CAT#: 406229

CAS#: 1251156-08-7

Description: XL388 is a Novel Class of Highly Potent, Selective, ATP-Competitive, and Orally Bioavailable Inhibitors of the Mammalian Target of Rapamycin (mTOR). XL388 inhibited cellular phosphorylation of mTOR complex 1 (p-p70S6K, pS6, and p-4E-BP1) and mTOR complex 2 (pAKT (S473)) substrates. XL388 displayed good pharmacokinetics and oral exposure in multiple species with moderate bioavailability. Oral administration of XL388 to athymic nude mice implanted with human tumor xenografts afforded significant and dose-dependent antitumor activity.

Price and Availability


USD 310


XL388, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received. Delivery time: overnight (USA/Canada); 3-5 days (worldwide).

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 406229
Name: XL388
CAS#: 1251156-08-7
Chemical Formula: C23H22FN3O4S
Exact Mass: 455.13151
Molecular Weight: 455.5
Elemental Analysis: C, 60.65; H, 4.87; F, 4.17; N, 9.23; O, 14.05; S, 7.04

Synonym: XL388; XL-388; XL 388

IUPAC/Chemical Name: (7-(6-aminopyridin-3-yl)-2,3-dihydrobenzo[f][1,4]oxazepin-4(5H)-yl)(3-fluoro-2-methyl-4-(methylsulfonyl)phenyl)methanone


InChi Code: InChI=1S/C23H22FN3O4S/c1-14-18(5-7-20(22(14)24)32(2,29)30)23(28)27-9-10-31-19-6-3-15(11-17(19)13-27)16-4-8-21(25)26-12-16/h3-8,11-12H,9-10,13H2,1-2H3,(H2,25,26)

SMILES Code: O=C(N1CCOC2=CC=C(C3=CC=C(N)N=C3)C=C2C1)C4=CC=C(S(=O)(C)=O)C(F)=C4C

Technical Data

Solid powder

>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).

Soluble in DMSO, not 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).

Harmonized System Code:

Additional Information

 XL388 activity:  (data copied from J Med Chem. 2013 Mar 28;56(6):2218-34.)
  Bioactivity of XL388  



1: Takeuchi CS, Kim BG, Blazey CM, Ma S, Johnson HW, Anand NK, Arcalas A, Baik TG, Buhr CA, Cannoy J, Epshteyn S, Joshi A, Lara K, Lee MS, Wang L, Leahy JW, Nuss JM, Aay N, Aoyama R, Foster P, Lee J, Lehoux I, Munagala N, Plonowski A, Rajan S, Woolfrey J, Yamaguchi K, Lamb P, Miller N. Discovery of a Novel Class of Highly Potent, Selective, ATP-Competitive, and Orally Bioavailable Inhibitors of  the Mammalian Target of Rapamycin (mTOR). J Med Chem. 2013 Mar 28;56(6):2218-34.  doi: 10.1021/jm3007933. Epub 2013 Mar 7. PubMed PMID: 23394126.