Colneleate synthase (EC 4.2.1.121, 9-divinyl ether synthase, 9-DES, CYP74D, CYP74D1, CYP74 cytochrome P-450, DES1) is an enzyme with system name (8E)-9-((1E,3E)-nona-1,3-dien-1-yloxy)non-8-enoate synthase. This enzyme catalyses the following chemical reaction
This enzyme is a heme-thiolate protein (P450).