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
16595-80-5
Alternate CAS Number
14769-73-4(Freebase);32093-35-9(Phosphate salt)
CAS Number
100986-85-4
Alternate CAS Number
138199-71-0(Hemihydrate Salt)
CAS Number
51-48-9
Alternate CAS Number
25416-65-3(Na Salt);55-03-8(Sodium Salt)
CAS Number
34552-83-5
Alternate CAS Number
53179-11-6 (Free base)
CAS Number
53179-11-6
Alternate CAS Number
34552-83-5(HCl Salt)