A inhibitor of sphingolipids synthesis comprising a compound represented by general
formula A. Desirably, a novel inhibitor of sphingolipids synthesis comprising (1R,
3R) N-(3-hydroxy-1-hydroxymethyl-3-phenylpropyl) alkaneamide, wherein carbon number
of alkanoyl group is 8-16.
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(in the formula, X is an aliphatic alkyl group, desirably is an aliphatic alkyl
group having 7 to 15 carbon atoms).