2-deoxopteropodine

(4aS)-7-(2-indol-3-yl-ethyl)-1c-methyl-6-oxo-(4ar,8ac)-4a,5,6,7,8,8a-hexahydro-1H-pyrano[3,4-c]pyridine-4-carboxylic acid methyl ester

cathenamine

(4S)-5c-formyl-4r-methoxycarbonylmethyl-6t-methyl-5,6-dihydro-4H-pyran-3-carboxylic acid methyl ester

methyl (1'S,4a'S,5a'S,10a'S)-2-ethoxy-1'-methyl-4a',5',5a',7',8',10a'-hexahydro-1'H,10'H-spiro[indole-3,6'-pyrano[3,4-f]indolizine]-4'-carboxylate