New Fatty Acid Derivative from the Stem Bark of Cassia grandis

For the first time, the n-hexane extract from the dried stem bark of Cassia grandis L.f. was investigated, and one new fatty acid derivative, named casgraester A ( 1 ), was obtained, together with three known ones, 2,3-dihydroxypropyl 28-hydroxyoctacosanoate ( 2 ), 2,3-dihydroxypropyl octacosanoate ( 3 ), bis-(2,3-dihydroxypropyl)tetracosanedioate ( 4 ), three known triterpenoids, lupeol ( 5 ), betulinic acid ( 6 ), oleanolic acid ( 7 ), and three known steroids, β -sitosterol ( 8 ), 3-O- β -D-glucopyranosyl- β -sitosterol ( 9 ), and 3-O- β -D-glucopyranosylbrassicasterol ( 10 ). For the first time, compounds 2–4 , 6 , and 10 were reported from the genus Cassia, while compounds 5 , 7 , and 9 were found for the first time from this species. Their structures were elucidated by IR, HR-ICR-MS, ESI-MS/MS, and NMR experiments.