The title compound, C26H36O5, is a derivative of abietic acid formed by an endo‐Diels–Alder reaction between maleic anhydride and the diene levopimaric acid ethyl ester. The two fused and unbridged cyclohexane rings have chair conformations and the anhydride ring is planar.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.