Potent anticonvulsant paeonimetabolin-I derivatives obtained by incubation of paeoniflorin and thiol compounds with Lactobacillus brevis - Abdel-Hafez,A.A.; Meselhy,M.R.; Nakamura,N.; Hattori,M.; Watanabe,H.; Mohamed,T.A.; Mahfouz,N.M.; El-Gendy,M.A. (Chem Pharm Bull, 1998)