(4S,7S,12bR)-7-((S)-1-Ethoxycarbonyl-3-phenyl-propylamino)-6-oxo-1,2,3,4,6,7,8,12b-octahydro-benzo[c]pyrido[1,2-a]azepine-4-carboxylic acid benzhydryl ester
(4S,7S,12bR)-7-Amino-6-oxo-1,2,3,4,6,7,8,12b-octahydro-benzo[c]pyrido[1,2-a]azepine-4-carboxylic acid benzhydryl ester
(4S,7S,12bR)-7-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-6-oxo-1,2,3,4,6,7,8,12b-octahydro-benzo[c]pyrido[1,2-a]azepine-4-carboxylic acid benzhydryl ester