| abstract |
Provided are a hydrochloride of a tricyclic pyrazolopyrimidine compound that inhibits the action of Hsp90 and a crystal thereof. The present invention provides a hydrochloride of 2-{4-amino-2-[(3-chloro-4-methoxy-5-methylpyridine-2-yl)methyl]-2,7-dihydro-6-thia-1,2,3,5-tetraazabenzo[cd]azulene-8-yl}-N-methylacetamide that inhibits the activity of Hsp90 ATPase and has antitumor activity, a crystal thereof, and a medicine, anticancer agent, and the like containing the same. |