Showing structure for (1r,3s,4s,7r,8e,11s,12r,13s,16s)-1,4,16-trimethyl-6-oxo-13-(prop-1-en-2-yl)tetracyclo[9.7.0.0³,⁷.0¹²,¹⁶]octadec-8-ene-8-carbaldehyde