100643-15-0 2-Amino-1H-pteridin-4-one 2-Amino-4(1H)-pteridinone 2-Amino-4(3H)-pteridinone 2-Amino-4-hydroxypteridine 2-Amino-4-pteridone 2236-60-4 27839-95-8 4(1H)-Pteridinone, 2-amino- 4-Oxopterin 938-42-1 EINECS 218-799-1 NSC 11540 NSC 170929 NSC 18696 Pteridoxamine Pterin Pterin (VAN) Quinonoid dihydropterin, 2-amino-