Two kaurenoids, taibairubescensins A and B, were isolated from the ethanol extract of the leaves and branches of Isodon rubescens. Their structures are designated as 2 beta, 3 beta-diacetoxy-11 beta, 13 alpha-dihydroxy-ent-kaur-16-en-15-one and 3 beta, 11 beta-diacetoxy-2 beta, 6 alpha-dihydroxy-ent-kaur-16-en-15-one, respectively, on the basis of detailed spectroscopic analyses.