伊立替康杂质，15671228-03-6

Name： 3,10-diethyl-1,13-dioxo-11,13-dihydro-1H,3H-furo[3′,4′:6,7]indolizino[1,2-b]quinolin-8-yl [1,4′-bipiperidine]-1′-carboxylate

CAS：143490-53-3

C32H36N4O5

Exact Mass: 556.27

Mol. Wt.: 556.65

m/e: 556.27 (100.0%), 557.27 (37.8%), 558.28 (6.4%), 558.27 (1.5%), 559.28 (1.1%)

C, 69.05; H, 6.52; N, 10.06; O, 14.37