Showing structure for (5z,8e,11r,13e,15s,25s)-1,11,21-trihydroxy-17-[(1r)-1-hydroxyethyl]-5,13-bis(2-methoxy-2-oxoethylidene)-10,10,26,26-tetramethyl-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.1³,⁷.1¹¹,¹⁵]nonacos-8-en-25-yl butanoate