SEARCH Articles Figures Tables A -Methyl- 2-pyrrolidone A-Oxo-N-heterocyclics 2-pyrrolidones A-Vinyl-2-pyrrolidone N-Methyl-2-pyrrolidone as solvent Poly(A-vinyl pyrrolidone) Pyrrolidon Pyrrolidone Pyrrolidones Pyrrolidones as solvents