(Z)-9-tert-Butoxycarbonyl-2,3-dihydro-3,3,7-trimethyl-dipyrrin-1-one-8-propanoic acid

(Z)-tert-Butyl-2,3-dihydro-3,3,7-trimethyl-8-(2-methoxycarbonylethyl)-dipyrrin-1-one-9-carboxylate

(Z,Z,Z)-17-Ethyl-1,2,3,4,5,19,23,24-octahydro-3,3,7,13,18-pentamethyl-1,19-dioxo-21H-bilin-8,12-dipropanoic acid

(Z,Z,Z)-17-Ethyl-1,2,3,19,23,24-hexahydro-3,3,7,13,18-pentamethyl-1,19-dioxo-21H-bilin-8,12-dipropanoic acid

t-butyl 3-(2-methoxycarbonylethyl)-4-methyl-5-(3,3,5-trimethyl-3,4-dihydro-2H-pyrrol-2-yl)methylpyrrole-2-carboxylate