From the ethanol extract of dried powders of Andrographis paniculata Nees leaves growing in Hung Yen province, five compounds were isolated and identified: andrographolide (1), dodecahexanoic acid (2), Beta-sitosterol (3), a mixture of 14-deoxy-11,12-didehydroandrographolide (4a) and 14-deoxyandrographolide (4b) (in ratio of 11:5). Their structures were confirmed by various spectral methods (IR, NMR, EIMS, 1H-NMR, 13C-NMR, etc.) and by comparison with those of references.