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2-Fluoroadenine700-49-2100 % similar 2-Chloroadenine1839-18-561 % similar Isoguanine3373-53-359 % similar Adenine73-24-547 % similar Adenine hydrochloride2922-28-343 % similar 2,6-Diaminopurine1904-98-939 % similar 2,6-Dichloropurine5451-40-138 % similar Adenine sulfate321-30-237 % similar Adenine phosphate52175-10-737 % similar 2-Amino-6-chloropurine10310-21-133 % similar 5-Fluoroquinazolin-4-amine137553-48-132 % similar 6-Chloro-5-fluoropyrimidin-4-amine851984-15-132 % similar 5H-Pyrrolo[3,2-D]pyrimidin-4-amine (9ci)2227-98-731 % similar