Studies on the anti-tumor-promoting activity of natural occurring substances. IV. Pd-II [(+)anomalin, (+)praeruptorin B], a seselin-type coumarin, inhibits the promotion of skin tumor formation by 12-O-tetradecanoylphorbol 13-acetate in 7,12-dimethylbenz[a]anthracene-initiated mice - Nishino,H.; Okuyama,T.; Takata,M.; Shibata,S.; Tokuda,H.; Takayasu,J.; Hasegawa,T.; Nishino,A.; Ueyama,H.; Iwashima,A. (Carcinogenesis, 1990)