13-Oxa-1,5-dithiaspiro[5.17]tricos-21-en-14-one,10-hydroxy-11-[(1S,2E,4S,5Z)-1-hydroxy-2,4-dimethyl-2,5-heptadienyl]-16-methoxy-18-[(4-methoxyphenyl)methoxy]-9,17,19,21,23-pentamethyl-15-[[2-(trimethylsilyl)ethoxy]methoxy]-20-[[tris(1-methylethyl)silyl]ox