5-(2-hydroxypropan-2-yl)pyrrolidin-2-one;5-(1-hydroxy-1-methyl-ethyl)pyrrolidin-2-one;5-(1-hydroxy-1-methylethyl)-2-pyrrolidinone;5-(1-hydroxy-1-methyl-ethyl)-2-pyrrolidone
5-(2-hydroxypropan-2-yl)pyrrolidin-2-one