(-)Clausenamide

levoclausenamide

(-)-3-hydroxy-5-(hydroxy-phenyl-methyl)-1-methyl-4-phenyl-pyrrolidin-2-one

(3R)-1-Methyl-3α-hydroxy-4β-phenyl-5β-[(R)-α-hydroxybenzyl]pyrrolidine-2-one

(3R)-3α-(Hydroxy)-5β-[(R)-hydroxy(phenyl)methyl]-1-methyl-4β-phenylpyrrolidin-2-one

(3R,4S,5S)-3-Hydroxy-5-[(R)-hydroxy-phenylmethyl]-1-methyl-4-phenylpyrrolidin-2-one