Two new C-15 enolic acyl phragmalin-type limonoids from Chukrasia tabularis var. velutina.
Two new C-15 enolic acyl phragmalin-type limonoid orthoesters, chukvelutilide G (1) and chukrasine F (2), were isolated from the stem barks of Chukrasia tabularis var. velutina. Their structures were elucidated by their extensive high resolution-electrospray ionization mass spectrometry (HR-ESI-MS), one- and two-dimensional spectroscopic analysis, including heteronuclear single quantum coherence (HSQC), HMBC and NOESY experiments.
T1 T2 T3 T4 T5 T6
CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL CHEMICAL
enolic acyl phragmalin limonoid orthoesters chukvelutilide G chukrasine F enolic acyl phragmalin limonoids