The molecule is a HETE that consists of arachidonic acid bearing a hydroxy substituent at position 18. It derives from an icosa-5,8,11,14-tetraenoic acid. It is a conjugate acid of a 18-HETE(1-).
(5Z,8Z,11Z,14Z)-18-hydroxyicosa-5,8,11,14-tetraenoic acid