Three New C-16/C-30 δ-Lactone Ring Phragmalin-Type Limonoids from Chukrasia tabularis Var. velutina
Hui Li, Jun Luo and Lingyi Kong
State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, P. R. China
Abstract: Three new phragmalin-type limonoids, with isomeric D-lactone ring from C-16/C-17 to C-16/C-30, tabulalin K(1),L(2),M(3) were isolated from the stem barks of Chukrasia tabularis var. velutina during our ongoing research work in this area. Their structures were elucidated on HR-ESI-MS, 1H and 13C-NMR, HSQC, HMBC, and ROESY experiments.
Keywords: Phragmalin-type limonoids; C-16/C-30 δ-lactone ring; Chukrasia tabularis var. velutina.
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