Antifungal rosane diterpenes and other constituents of Hugonia castaneifolia

3β-Hydroxyrosa-1(10),15-dien-2-one (1), 18-hydroxyhugorosenone (2) and 18-hydroxy-3-deoxyhugorosenone (3), and 12-hydroxy-13-methylpodocarpa-8,11,13-trien-3-one (5) were isolated as antifungal constituents of Hugonia castaneifolia, together with 1(10),15-rosadiene-2β,3β-diol (4), 4α-methoxyhimachal-10-en-5β-ol (6) and other weakly or inactive compounds. Hugorosenone also exhibited larvicidal activity.