CPT01: Camptothecin

(S)-4-Ethyl-4-hydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione
[CAS # 7689-03-4]

CPT02: 7-Ethyl Camptothecin

(S)-4,11-Diethyl-4-hydroxy-1H-pyrano(3',4':6,7)indolizino(1,2-b)quinoline-3,14(4H,12H)-dione
[CAS # 78287-27-1]

CPT03: 7-Ethyl-10-Hydroxy Camptothecin

(S)-4,11-Diethyl-4,9-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione
[CAS # 86639-52-3]

CPT04: 10-Hydroxy Camptothecin

(S)-4-Ethyl-4,10-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione
[CAS # 19685-09-7]

CPT05: Irinotecan Hydrochloride Trihydrate

(S)-4,11-Diethyl-3,4,12,14-tetrahydro-4-hydroxy-3,14-dioxo1H-pyrano[3’,4’:6,7]-indolizino[1,2-b]quinolin-9-yl-[1,4’bipiperidine]-1’-carboxylate Hydrochloride Trihydrate
[CAS # 136572-09-3]

CPT06: Topotecan Hydrochloride

(S)-10-[(Dimethylamino)methyl]-4-ethyl-4,9-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione monohydrochloride
[CAS # 119413-54-6 for HCl Salt] [CAS # 123948-87-8 for Free Base]