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

MedKoo CAT#: 407285

CAS#: 1527503-11-2

Description: A-366 is a potent inhibitor of G9a/GLP with IC50 3 nM and > 100-fold selectivity over other methyltransferases and other non-epigenetic targets. A-366 has been shown to inhibit H3K9 methylation in cells with an IC50 of 100 nM and exhibits minimal cellular toxicity compared with previous quinazoline-based probes. A-366 selectively inhibits G9a and the closely related GLP (EHMT1), but not other histone methyltransferases. A-366 has significantly less cytotoxic effects on the growth of tumor cell lines compared to other known G9a/GLP small molecule inhibitors despite equivalent cellular activity on methylation of H3K9me2.

Chemical Structure

CAS# 1527503-11-2

Theoretical Analysis

MedKoo Cat#: 407285
Name: A-366
CAS#: 1527503-11-2
Chemical Formula: C19H27N3O2
Exact Mass: 329.2103
Molecular Weight: 329.444
Elemental Analysis: C, 69.27; H, 8.26; N, 12.76; O, 9.71

Price and Availability

Size Price Availability Quantity
5.0mg USD 250.0 2 Weeks
10.0mg USD 425.0 2 Weeks
50.0mg USD 1000.0 2 Weeks
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Synonym: A-366; A 366; A366.

IUPAC/Chemical Name: 5'-methoxy-6'-(3-(pyrrolidin-1-yl)propoxy)spiro[cyclobutane-1,3'-indol]-2'-amine


InChi Code: InChI=1S/C19H27N3O2/c1-23-16-12-14-15(21-18(20)19(14)6-4-7-19)13-17(16)24-11-5-10-22-8-2-3-9-22/h12-13H,2-11H2,1H3,(H2,20,21)


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 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 329.444 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: Pappano WN, Guo J, He Y, Ferguson D, Jagadeeswaran S, Osterling DJ, Gao W,
Spence JK, Pliushchev M, Sweis RF, Buchanan FG, Michaelides MR, Shoemaker AR, Tse
C, Chiang GG. The Histone Methyltransferase Inhibitor A-366 Uncovers a Role for
G9a/GLP in the Epigenetics of Leukemia. PLoS One. 2015 Jul 6;10(7):e0131716. doi:
10.1371/journal.pone.0131716. eCollection 2015. PubMed PMID: 26147105; PubMed
Central PMCID: PMC4492996.


5.0mg / USD 250.0