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
5250-39-5
Alternate CAS Number
1847-24-1 (Na salt)
CAS Number
52468-60-7
Alternate CAS Number
30484-77-6(DiHCl Salt)
CAS Number
58-05-9
Alternate CAS Number
1492-18-8(Ca Salt);6035-45-6(Ca Pentahydrate Salt)
CAS Number
33288-71-0
Alternate CAS Number
84522-34-9 (Na salt)
CAS Number
29094-61-9
Alternate CAS Number
228111-78-2 (HCl salt) ; 88159-36-8 (Na salt)
CAS Number
87-00-3
Alternate CAS Number
51-56-9(HBr Salt)
CAS Number
86-54-4
Alternate CAS Number
304-20-1(HCl salt)
CAS Number
152459-95-5 (Free Base)
Alternate CAS Number
220127-57-1 (Mesylate)