New iridoids from Gardenia jasminoides Ellis

• Main Author: Pimenta, Leslie Elline Nery
• Format: text
• Language: English
• Published: Animo Repository 2005
• Subjects: Gardenia; Flowers; Plant metabolites; Chemistry
• Online Access: https://animorepository.dlsu.edu.ph/etd_masteral/3363; https://animorepository.dlsu.edu.ph/cgi/viewcontent.cgi?article=10201&context=etd_masteral
• Institution: De La Salle University

Four new iridoids (GA6, GA5-1, GA5-2 and GA5-3), squalene (GA4), and mixture of sitosterol and stigmasterol (GA1) were obtained from air-dried flowers of Gardenia jasminoides Ellis. (syn. Gardenia augusta), commonly known as rosal. Compound GA6 was obtained as a pure compound, while GA5-1 and GA5-2 were obtained as a diasteriomeric mixture, together with GA5-3. The structures of the three new iridoids (GA6, GA5-1 and GA5-2) were elucidated by extensive 1D and 2D NMR spectroscopy. The structures of squalene (GA4) and mixture of stigmasterol and sitosterol (GA1) were deduced from comparison of their spectral data with those reported for these compounds in the literature.