Ethyl (E)-3-hy­droxy-2-{N-[2-(thio­phen-2-yl)ethen­yl]carbamo­yl}but-2-enoate

In the title compound, C₁₃H₁₅NO₄S, there are two independent but conformationally similar mol­ecules in the asymmetric unit, both having an E conformation of the side-chain C=C group. Intra­molecular N—H...O and O—H...O hydrogen-bonding inter­actions are present in both molecules. In the crystal, one of the mol­ecule types is linked through inter­molecular hy­droxy–ketone O—H...O inter­actions, forming one-dimensional chains extending along [010], whereas the other mol­ecule type shows no associations.