Bilineurine, ethylol trimethylammonium hydroxide, OHCH2CH2N(CH3)3OH. An amine base present in the blood, cerebrospinal fluid and urine, and which may be extracted from many of the body tissues, including skeletal and cardic muscle. It may be joined from lecithin by putrefaction and so may be produced in the bowel. It is often member of the B complex of vitamins as it commonly occurs together with other members of this group.