L-Glutamic acid,N-[4-[[(2,4-diamino-6-pteridinyl)methyl]methylamino]benzoyl]-, hydrate (9CI) (+)AMETHOPTERINE HYDRATE (+)-AMETHOPTERIN HYDRATE 4-AMINO-10-METHYLFOLIC ACID HYDRATE METHYLAMINOPTERIN HYDRATE METHOTREXATE HYDRATE L-4-AMINO-N10-METHYLPTEROYL-GLUTAMIC ACID HYDRATE L-(+)-AMETHOPTERIN HYDRATE