(4R,5S)-4-methyl-5-phenyl-3-((2E,4E)-1-oxo-2,4-hexadienyl)-2-oxazolidinone

(4E,11E,13E)-(1S,6R,10R,15R,18R,19R,20S)-8,8,15-trimethyl-18-((S)-1-methylbut-3-ynyl)-19-triethylsilanyloxy-7,9,17,23-tetraoxatricyclo[18.2.1.06,10]tricosa-4,11,13-trien-16-one