CAS Number: 1008-35-1
Chemical Name: 5,6,7,8-Tetrahydropterin
Molecular Formula: C6H9N5O
Molecular Weight: 167.17

CAS Number: 17838-80-1
Chemical Name: 7,8-Dihydropterin
Molecular Formula: C6H7N5O
Molecular Weight: 165.16

CAS Number: 62989-33-7
Chemical Name: Sapropterin
Molecular Formula: C9H15N5O3
Molecular Weight: 241.25