(2S,3S)-3-{(2R,3S)-3-[(1aR,1bR,5aR,5bR,7aR,8R,10aS,10bS,10cR)-1b,7-dihydroxy-5a,7a-dimethyl-1b,5a,5b,7a,8,9,10,10a,10b,10c-decahydro-1aH-cyclopenta[1,2]phenanthro[9,10-b]oxiren-8-yl]-2-hydroxybutyl}-2,3-dimethyloxirane-2-carboxylic acid (non-preferred nam