Octadecadienoic Acid n-4

**Semantic type:** Organic Chemical

**Definition:** A polyunsaturated long-chain fatty acid with an 18-carbon backbone and double bonds originating from the 4th position and either the 7th position or the 8th position from the methyl end. There are at least 4 different stereoisomers that can be called by this name.

**Synonyms:** - Fatty Acid 18:2 n-4