Irinotecan EP Impurity B Sodium salt

Chemical Name: (4S)-4-ethyl-4,9-dihydroxy-1H-pyrano[3′,4′:6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione Sodium salt (as per EP);(S)-4,11-Diethyl-4,9-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione Sodium salt (as per USP)

Smile: O=C1[C@](O)(CC)C2=C(CO1)C(N3CC4=CC5=CC(O)=CC=C5N=C4C3=C2)=O.[Na]