Methyl vouacapenate

Vouacapenic acid methyl ester

(4S)-4,7β,11bα-Trimethyl-1,2,3,4,4aβ,5,6,6aα,7,11,11aβ,11b-dodecahydrophenanthro[3,2-b]furan-4α-carboxylic acid methyl ester

[4S,(+)]-1,2,3,4,4aβ,5,6,6aα,7,11,11aβ,11b-Dodecahydro-4,7β,11bα-trimethylphenanthro[3,2-b]furan-4α-carboxylic acid methyl ester