Showing structure for (1s,2s,3r,4r,7r,8r,11s,14r,15r,17s)-15-hydroxy-14-methoxy-4,8,11,15-tetramethyl-9-oxo-10,18-dioxatetracyclo[9.7.0.0²,⁷.0³,¹⁷]octadecan-4-yl butanoate