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
1429908-35-9(free base)
Alternate CAS Number
2228086-73-3(HBr Salt)
CAS Number
1293489-74-3(free base)
Alternate CAS Number
1293342-97-8(HCl salt)
CAS Number
1293489-71-0(freebase)
Alternate CAS Number
1293342-91-2(HCl Salt); 1293343-91-5(HBr)
CAS Number
86-54-4
Alternate CAS Number
304-20-1(HCl salt)