| abstract |
A compound represented by general formula (I), a racemic form thereof, or a salt of the compound or the racemic form. (In general formula (I), X represents an oxygen atom, a nitrogen atom, a sulfur atom or a carbon atom; R1 represents R1a-Y-R1b (wherein each of R1a and R1b represents a saturated or unsaturated aliphatic hydrocarbon group, an aromatic group, a heterocyclic group, or a group obtained by combining these groups; and Y represents an oxygen atom, a nitrogen atom, a sulfur atom or a carbon atom); each R2 represents a saturated or unsaturated aliphatic hydrocarbon group; and R3 represents choline, ethanolamine, inositol or serine.) |