reduced folates like 5-cho-h ( 4 ) pteglu and methyl-tetrahydrofolate ( 5-ch ( 3 ) -h ( 4 ) pteglu ) as well as 2,4-diaminoanalogues ( amethopterin and aminopterin ) were shown to compete for the pteglue-carrier .
C0025677
amethopterin
C0002583
aminopterin