<p>A compound of the formula
CH2=CR-CO-NH-CO-X-Y (I)
wherein R is H or C1-8 alkyl; X is -O-, -S-, -NH- or -N(C1-8 alkyl)-; and Y is the residue of an active hydrogen atom-containing compound (excluding -X-H therefrom).
<??>Such compounds can be dissolved in an organic solvent having a solubility parameter of not less than 8. They can impart excellent physical properties to a polymer produced therefrom. </p>