Heterocyclic compound is a major class of organic chemical compounds characterized by some or all of the atoms in their molecules are joined in rings containing atleast one atom of an element other than carbon.

CAS Number
54016-70-5
Alternate CAS Number
45892-42-0 (free base)
CAS Number
65576-45-6
Alternate CAS Number
85650-56-2(Maleate Salt)