(R)-3-(((1R,3R,3aS,3bR,5aS,6aR,8S,10aR,11aS,11bS,13aR)-3,3a-dihydroxy-11a,13a-dimethyl-9-oxo-1-(5-oxo-2,5-dihydrofuran-3-yl)octadecahydro-1H-cyclopenta[7,8]phenanthro[2,3-b][1,4]dioxin-8-yl)oxy)butanal

1,3-二羟基丙酮

5-oxo-2,5-dihydrofuran-3-carboxylic acid

carbon monoxide

2-丙炔-1-醇