Showing structure for (1s,6r,11r,12r,15s,16r,19s,21s)-19-methoxy-1,7,7,11,16,20,20-heptamethylpentacyclo[13.8.0.0³,¹².0⁶,¹¹.0¹⁶,²¹]tricos-3-en-8-one