(S)-2-(12-Ethyl-8-hydroxymethyl-9-oxo-9,11-dihydro-indolizino[1,2-b]quinolin-7-yl)-2-hydroxy-butyric acid hydrazide

Acetic acid 7-[(S)-1-(2-dimethylamino-ethylcarbamoyl)-1-hydroxy-propyl]-12-ethyl-9-oxo-9,11-dihydro-indolizino[1,2-b]quinolin-8-ylmethyl ester

Isobutyric acid 7-[(S)-1-(2-dimethylamino-ethylcarbamoyl)-1-hydroxy-propyl]-12-ethyl-9-oxo-9,11-dihydro-indolizino[1,2-b]quinolin-8-ylmethyl ester