0 Topotecan hydrochloride CAS 123948-87-8 In APIs, Pharmaceutical Chemicals, Products 123948-87-8,Topotecan hydrochloride,4-Ethyl-4,9-dihydroxy-10-[(dimethylamino)methyl]-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione