Methylindoles

Skatole (also spelled skatol) or 3-methylindole is an organic compound belonging to the indole family. It occurs naturally in the feces of mammals and birds and is the primary contributor to fecal odor. At high to moderate conentrations, its aroma is described as "animal, fecal, naphthyl, civet". In low concentrations, it has a flowery smell and is found in several flowers and essential oils, including those of orange blossoms, jasmine, and Ziziphus mauritiana. It has also been identified in certain cannabis varieties.

Methylketol or 2-methylindole is a mildly toxic and slightly flammable organic compound which occurs as a white solid which turns brown over time. It has chemical formula .

1-Methylindole is an irritating, potentially toxic organic compound which occurs as a deep yellow viscous liquid with a very strong unpleasant odor. It has the chemical formula C9H9N.

5-Methylindole is an irritating organic compound with chemical formula . 5-Methylindole is used as an intermediate in the synthesis of compounds with a variety of pharmacological properties, such as staurosporine-like bisindole inhibitors of protein kinases.

7-Methylindole is a mildly toxic off-white crystalline organic compound with chemical formula .

A variety of isomers of methyl indole derivatives are known: 1-methylindole 2-methylindole skatole (3-methylindole) 4-methylindole 5-methylindole 6-methylindole 7-methylindole