Definition: A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates.
alpha-(4-fluorophenyl)-4-(5-fluoro-2-pyrimidinyl)-1-piperazine butanol [ BMY 14802,BMS 181100,BMS-181100,BMY 14802-1,BMY-14802 ] NM refers to free form; BMY 14802-1 is the HCl; structure given in first source