(1R,2R,3S,8R,10R,11R,15S,16S)-3-(acetyloxy)-15-(1-hydroxy-4-oxobutan-2-yl)-2,7,7,11,16-pentamethyl-5-oxo-6-oxatetracyclo[9.7.0.0(2,8).0(12,16)]octadec-12-en-10-yl acetate
(1r,2r,3s,8r,10r,11r,15s,16s)-3-(acetyloxy)-15-(1-hydroxy-4-oxobutan-2-yl)-2,7,7,11,16-pentamethyl-5-oxo-6-oxatetracyclo[9.7.0.0(2,8).0(12,16)]octadec-12-en-10-yl acetate