. "11,16,16-trimethyl-8-methylene-(1S,10S)-15-oxapentacyclo[8.4.1.111,14.01,10.02,7]hexadeca-2(7),3,5-trien-12-yl 3-(4-benzyloxyphenyl)-2-hydroxy-3-ethoxycarboxamido-(2R)-propanoate" . "17g" . . . .