Profoxydim, a herbicide utilized for controlling grass weeds in rice fields, features a cyclic ketone structure. This structure comprises 3-hydroxycyclohex-2-en-1-one, which at position 2, is modified by a N-[2-(4-chlorophenoxy)propoxy]butanimidoyl group and at position 5, it is substituted by a thian-3-yl group.