The molecule is a 2-monoglyceride in which the acyl group is specified as (9E,12E,15E)-octadecatrienoyl. It is a 2-monoglyceride and a monoacylglycerol 18:3.
1,3-dihydroxypropan-2-yl (9E,12E,15E)-octadeca-9,12,15-trienoate