英文别名1,2-Pyrrolidinedicarboxylic acid, 4-(methoxymethyl)-, 2-[2-(9-bromo-8,9,10,11-tetrahydro-8-oxo-5H-benzo[d]naphtho[2,3-b]pyran-3-yl)-2-oxoethyl] 1-(1,1-dimethylethyl) ester, (2S,4S)-; (2S,4S)-2-(2-(9-bromo-8-oxo-8,9,10,11-tetrahydro-5H-dibenzo[c, g]chromen-3-yl)-2-oxoethyl) 1-tert-butyl 4-(methoxymethyl)pyrrolidine-1,2-dicarboxylate; 2-[2-(9-Bromo-8,9,10,11-tetrahydro-8-oxo-5H-benzo[d]naphtho[2,3-b]pyran-3-yl)-2-oxoethyl] 1-(1,1-dimethylethyl) (2S,4S)-4-(methoxymethyl)-1,2-pyrrolidinedicarboxylate; VP N-4; (2S,4S)-4-(Methoxymethyl)-1,2-pyrrolidinedicarboxylic acid 2-[2-(9-bromo-8,9,10,11-tetrahydro-8-oxo-5H-benzo[d]naphtho[2,3-b]pyran-3-yl)-2-oxoethyl] 1-(1,1-dimethylethyl) ester; Velpatasvir Impurity 25; velpatasvir impurity 
