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Molecules 2013, 18(1), 373-380; doi:10.3390/molecules18010373
Article

Two New Phragmalin-Type Limonoids from Chukrasia tabularis var. velutina

1,2,†, 2,†, 2 and 2,*
Received: 23 October 2012 / Revised: 7 December 2012 / Accepted: 19 December 2012 / Published: 27 December 2012
(This article belongs to the Section Metabolites)
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Abstract

Two new phragmalin-type limonoids with different structural skeletons, chuktabrin K (1) and tabulalin J (2), were isolated from the stem barks of Chukrasia tabularis var. velutina in the course of our ongoing research work in this area. Compound 1 was a 16-norphragmalin with an enolic alkyl appendage at C-15, and the carbonate moiety in 1 was also rare in natural organic molecules. The basic skeleton of compound 2 was a D-ring-opened phragmalin. Their structures were elucidated on HR-ESI-MS, 1H and 13C-NMR, HSQC, HMBC, and ROESY experiments.
Keywords: phragmalin-type limonoids; 16-norphragmalin; carbonate moiety; Chukrasia tabularis var. velutina phragmalin-type limonoids; 16-norphragmalin; carbonate moiety; Chukrasia tabularis var. velutina
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Li, Y.; Luo, J.; Li, H.; Kong, L.-Y. Two New Phragmalin-Type Limonoids from Chukrasia tabularis var. velutina. Molecules 2013, 18, 373-380.

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