8,13,21,23-TETRACOSATETRAENAMIDE, 19-[(AMINOCARBONYL)OXY]-3,11,17-TRIS[[(1,1-DIMETHYLETHYL)DIMETHYLSILYL]OXY]-7-HYDROXY-N-METHOXY-N,2,4,10,12,14,16,18,20-NONAMETHYL-5-OXO-, (2R,3S,4R,7R,8Z,10S,11S,12S,13Z,16S,17R,18R,19S,20S,21Z)-