Showing structure for (1r,2r,5s,8r,14s,18s)-15-formyl-1,2,14,17,17-pentamethyl-8-(prop-1-en-2-yl)pentacyclo[11.7.0.0²,¹⁰.0⁵,⁹.0¹⁴,¹⁸]icos-15-ene-5-carboxylic acid