Robuta

https://webbook.nist.gov/cgi/inchi/InChI%3D1S/C20H32/c1-6-19(4)13-10-16-15(14-19)8-9-17-18(2%2C3)11-7-12-20(16%2C17)5/h6%2C17H%2C1%2C7-14H2%2C2-5H3/t17%3F%2C19%3F%2C20-/m1/s1 ent-Pimara-8,15-diene ent