Isoguanine3373-53-3100 % similar 2-Chloroadenine1839-18-561 % similar 2-Fluoroadenine700-49-259 % similar Adenine73-24-547 % similar Adenine hydrochloride2922-28-343 % similar Adenine sulfate321-30-240 % similar Adenine phosphate52175-10-740 % similar 2,6-Diaminopurine1904-98-939 % similar 2,6-Dichloropurine5451-40-138 % similar 5-Amino-2-benzimidazolinone95-23-835 % similar 5,6-Diaminobenzimidazolone55621-49-333 % similar 6-Amino-1,3,5-triazin-2(1H)-one931-86-233 % similar 2-Amino-6-chloropurine10310-21-133 % similar 2-Benzimidazolinone615-16-732 % similar 4-Amino-6-chloropyrimidin-5-ol38953-42-332 % similar 5H-Pyrrolo[3,2-D]pyrimidin-4-amine (9ci)2227-98-731 % similar