SEARCH Articles Figures Tables 5-Methyl-2-pyrrolidones A -Methyl- 2-pyrrolidone A N-methylated A-Pyrrolidone Methyl solvents Methylal as solvent N- -a-Methyl Pyrrolidon Pyrrolidone Pyrrolidones Pyrrolidones as solvents Solvents 2-pyrrolidone