The molecule is a 1,3-oxazolone derivative having a nitrophenyl substituent at the 2-position, an ethoxymethylene group at the 4-position, and an oxo group at the 5-position. It has a role as a hapten. It is a gamma-lactone and a member of 1,3-oxazoles.
(4E)-4-(ethoxymethylidene)-2-(4-nitrophenyl)-1,3-oxazol-5-one