2-pyrrolidinone, 5-(hydroxydiphenylmethyl)- 5-[hydroxy(diphenyl)methyl]pyrrolidin-2-one InChI=1/C17H17NO2/c19-16-12-11-15(18-16)17(20,13-7-3-1-4-8-13)14-9-5-2-6-10-14/h1-10,15,20H,11-12H2,(H,18,19