A methylguanine carrying the methyl substituent at position 3.
| Member | Definition | Role |
|---|
| 3-methylguanine | A 3-methylguanine that is 3,7-dihydro-6H-purin-6-one substituted by an amino group at position 2 and a methyl group at position 3. | 2-amino-3-methyl-3,7-dihydro-6H-purin-6-one; 2-amino-3-methyl-3,9-dihydro-6H-purin-6-one; 2-imino-3-methyl-1,2,3,9-tetrahydro-6H-purin-6-one |
| 3-methylguanine | A 3-methylguanine that is 3,9-dihydro-6H-purin-6-one substituted by an amino group at position 2 and a methyl group at position 3. | 2-amino-3-methyl-3,7-dihydro-6H-purin-6-one; 2-amino-3-methyl-3,9-dihydro-6H-purin-6-one; 2-imino-3-methyl-1,2,3,9-tetrahydro-6H-purin-6-one |
| 3-methylguanine | A 3-methylguanine that is 1,2,3,9-tetrahydro-6H-purin-6-one substituted by an imino group at position 2 and a methyl group at position 3. | 2-amino-3-methyl-3,7-dihydro-6H-purin-6-one; 2-amino-3-methyl-3,9-dihydro-6H-purin-6-one; 2-imino-3-methyl-1,2,3,9-tetrahydro-6H-purin-6-one |