Carapanins A-C: new limonoids from andiroba (Carapa guianensis) fruit oil.

Takashi Kikuchi, Keiko Akita, Hiroki Koike, Yasuko In, Takeshi Yamada, Reiko Tanaka

Organic & biomolecular chemistry 2020 Nov 25

filter terms:

Carapanins A-C (1-3) were isolated from the fruit oil of Carapa guianensis. Compounds 1 and 2 are limonoids with unique structures. Namely, compound 1 is an andirobin-type limonoid with a C-15/C-30 γ-lactone instead of the δ-lactone of the D-ring, and compound 2 is a mexicanolide-type limonoid with a C-16/C-30 δ-lactone ring. The absolute structures of 1 and 2 were determined using X-ray crystallography, whereas the structure of 3 was established mainly via NMR and mass spectroscopy. The inhibitory effects of 1-3 on nitric oxide production were evaluated, and it was revealed that 2 and 3 were potent nitric oxide inhibitors.

Citation

Takashi Kikuchi, Keiko Akita, Hiroki Koike, Yasuko In, Takeshi Yamada, Reiko Tanaka. Carapanins A-C: new limonoids from andiroba (Carapa guianensis) fruit oil. Organic & biomolecular chemistry. 2020 Nov 25;18(45):9268-9274