Abstract
• Three new caesalatic acids A–C ( 1 - 3 ) were isolated from Caesalpinia latisiliqua (Cav.) Hattink. • Seven known compounds were also isolated. • The structures were successfully determined by spectroscopic evidence. Three new cassane- type diterpenoids, namely caesalatic acids A–C ( 1 ‒ 3 ), and seven known compounds, resveratrol ( 4 ), piceatannol ( 5 ), aromadendrin ( 6 ), taxifolin ( 7 ), 3,4-dihydroxybenzaldehyde ( 8 ), methyl gallate ( 9 ), and loliolide ( 10 ) were isolated from the methanol extract of the Caesalpinia latisiliqua (Cav.) Hattink leaves. Their chemical structures were elucidated by 1D- and 2D-NMR, MS data, circular dichroism, and compared with NMR data in the literature.
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