Nα-(4-amino-4-deoxy-N10-methylpteroyl)-L-lysine
Nα-(4-amino-4-deoxy-N10-methylpteroyl)-Nε-carbobenzoxy-L-lysine
Nα-(4-amino-4-deoxy-N10-methylpteroyl)-Nε-carbobenzoxy-L-lysine methyl ester
Nα-(4-amino-4-deoxy-N10-methylpteroyl)-Nε-(iodoacetyl)-L-lysine
4-{[N-[(2,4-diamino-6-pteridinyl)methyl]-N-methyl]amino}benzoyl azide