Showing structure for (1s,4s,5r,6r,10s)-4-hydroxy-13-methoxy-5-methyl-3,11,18-trioxopentacyclo[8.8.1.0¹,¹⁰.0²,⁷.0¹²,¹⁷]nonadeca-2(7),8,12(17),13,15-pentaen-6-yl acetate