Showing structure for (1r,2r,3s,4r,5s,7s,8s,9r,10s,12z,14s,17r)-2,5,7,9-tetrakis(acetyloxy)-4,8,12,17-tetramethyl-16-oxo-15,18-dioxatetracyclo[12.4.0.0¹,¹⁷.0³,⁸]octadec-12-en-10-yl butanoate