(6Z,10Z)-12-(tert-Butyl-diphenyl-silanyloxy)-3-hydroxy-6,10-dimethyl-2-[2-((1S,4aS,4bR,8aR,10aR)-2,4b,8,8,10a-pentamethyl-1,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydro-phenanthren-1-yl)-ethyl]-dodeca-6,10-dienoic acid methyl ester

(2E,6Z,10Z)-12-(tert-Butyl-diphenyl-silanyloxy)-6,10-dimethyl-2-[2-((1S,4aS,4bR,8aR,10aR)-2,4b,8,8,10a-pentamethyl-1,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydro-phenanthren-1-yl)-ethyl]-dodeca-2,6,10-trienoic acid methyl ester