1,4'-bipiperidine-1'-carboxylic acid (s)-4,11-diethyl-3,4,12,14- tetrahydro-4-hydroxy-3,14-dioxo-1h-pyrano(3',4':6,7)indolizino(1,2-b)quinolin-9-yl ester

1,4'-bipiperidine-1'-carboxylic acid (s)-4,11-diethyl-3,4,12,14- tetrahydro-4-hydroxy-3,14-dioxo-1h-pyrano(3',4':6,7)indolizino(1,2-b)quinolin-9-yl ester