Showing structure for (1r,2s,4s,10s,11s,13r,14s,19s)-10-methoxy-1,11,14,18,18-pentamethyl-8-oxapentacyclo[11.8.0.0²,¹¹.0⁵,⁹.0¹⁴,¹⁹]henicosa-5(9),6-dien-4-ol