Skatole can be synthesized via the Fischer indole synthesis. Skatole is derived from the amino acid tryptophan in the mammalian digestive tract. Skatole, the odorant in feces, is produced from tryptophan via indoleacetic acid. Skatole is produced from tryptophan via indoleacetic acid. Other components include other carboxylic acids, skatole, trimethyl amine, and isovaleric acid. With the testicular steroid androstenone, skatole is regarded as a principal determinant of boar taint. Other components include skatole and trimethyl amine. As a result, skatole accumulates in the fat of male pigs as they mature. Skatole is the starting material in the synthesis of atiprosin.