Pentacyclic triterpene 5‐phenylpenta‐2,4‐dienoyl esters from Peltastes peltatus (Vell.) Woodson

Abstract

Two new pentacyclic triterpene esters, peltastine A [3beta-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]-urs-12-ene] and peltastine B [3beta-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]-lup-20(29)-ene], have been isolated from the stem of Peltastes peltatus (Vell.) Woodson along with the previously reported beta-amyrin juarezate [3-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]-olean-12-ene]. The structures of these compounds were established by MS, 1D- and 2D-NMR experiments as well as by chemical degradation.

Evaluation of Ethnomedical Claim III: Anti‐hyperglycemic activities of Gongronema latifolium root and stem (民族药物需求评估III：Gongronema latifolium根与茎的降糖活性)

“…The melting points, infrared, 1 H– 1 H‐NMR (Homonuclear Correlated Spectroscopy (COSY), Homonuclear Total Correlated Spectroscopy (TOCSY)), 13 C‐NMR (Attached Proton Test (APT), Distortionless Enhancement Polarisation Transfer (DEPT)), 1 H‐ 13 C‐NMR (Heteronuclear multiple bond correlation (HMBC), Heteronuclear Single Quantum Correlation (HSQC)), ESIMS (positive, negative), and HRESIMS data of the isolates I 2 , G 4 and J 3 , were compared with information in the literature, enabling their identifications.…”

Toxicological evaluation of the João da Costa e Associações® on Beagle dogs

“…Chemically, literature mentions the presence of benzyl tetrahydroisoquinoline alkaloids in abutua (Gottlieb&Mors, 1980), uleine in agoniada (França et al, 2000), gossypol in cotton (Etges, 2007), essential oils, flavonoids and phenolic acids in rosemary (AlSereiti et al, 1999) and pentacyclic triterpenes in joaoda-costa barks (Humberto et al, 2004).…”