Irinotecan EP Impurity A Sulfate salt

Chemical Name: (4S)-4-ethyl-4-hydroxy-3,14-dioxo-3,4,12,14-tetrahydro-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quinolin-9-yl 1,4′-bipiperidine-1′-carboxylate Sulfate salt (as per EP);(S)-4-Ethyl-4-hydroxy-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quin oline-3,14(4H,12H)-dione-9-yl (1,4′-bipiperidine)-1′-carboxylate Sulfate salt (as per USP)

Smile: O=S(O)(O)=O.O=C(N1CCC(N2CCCCC2)CC1)OC3=CC=C4N=C5C(CN6C(C(COC([C@@]7(CC)O)=O)=C7C=C65)=O)=CC4=C3