Im supposed to mark the following structures in ailanthone (picture):
„A review of the chemical structures of quassinoids (ailanthone is a quassinoid) reveals the presence of several common features. Important functional groups that are crucial for biological activity include an α,β-unsaturated carbonyl group in the A-ring, a methylenedioxy bridge in the C-ring, and a β-lactone structure in the D-ring“
I’m a biology student and absolutely useless when it comes to chemistry but I try to better myself. Any help is appreciated