Kreusser, Edward H. et al. published their research in Cancer Research in 1966 | CAS: 7413-34-5

Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate (cas: 7413-34-5) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. Amides can be freed from solvent or water by drying below their melting points. These purifications can also be used for sulfonamides and acid hydrazides.Name: Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate

Nonspecific esterases in normal and neoplastic tissues of the Syrian hamster: a zymogram study was written by Kreusser, Edward H.. And the article was included in Cancer Research in 1966.Name: Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate This article mentions the following:

Normal tissues and 18 tumor types of the Syrian hamster were studied electrophoretically and stained selectively for esterases, and the 2 groups were compared. Esterase-banding patterns of normal tissue appeared to be distinct from one another to a degree which roughly paralleled structural and functional differences. With few exceptions, tumor patterns did not resemble those of parent tissues but did exhibit a marked tendency to assume a common pattern. In the experiment, the researchers used many compounds, for example, Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate (cas: 7413-34-5Name: Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate).

Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate (cas: 7413-34-5) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. Amides can be freed from solvent or water by drying below their melting points. These purifications can also be used for sulfonamides and acid hydrazides.Name: Sodium (S)-2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics