procedures, while the structures of isolated compounds were determined on the basis of their NMR and MS spectral analysis. As a result, two new compounds were isolated from its ethanolic extract and characterized as cinobufotalin 3-nonanedioylarginine ester (8) and bufotalin 3-pimeloylarginine ester (14). Furthermore, 13 known compounds were obtained. Isolated bufadienolides showed significant inhibition