Compounds 7-13 were isolated from the water extractive of Cinnamomi Cortex (the dried bark of Cinnamomum cassia BLUME, "Toko Keihi"in Japanese, Lauraceae), which shows anti-complement activity. Among them, the compounds 7 and 8 were characterized by chemical and spectral means and named cinncassiol B and cinncassiol B 19-O-β-D-glucopyranoside, respectively.