| Title:  Diopterin CAS Registry Number:  6807-82-5 CAS Name:  N-[N-[4-[[(2-Amino-1,4-dihydro-4-oxo-6-pteridinyl)methyl]amino]benzoyl]-L-a-glutamyl]-L-glutamic acid Additional Names:  pteroyl-a-glutamylglutamic acid;  pteroyldiglutamic acid;  PDGA Molecular Formula:  C24H26N8O9 Molecular Weight:  570.51 Percent Composition:  C 50.53%, H 4.59%, N 19.64%, O 25.24% Literature References:  Folic acid analog.  Synthesis:  Mowat et al., J. Am. Chem. Soc. 70, 1096 (1948); Hutchings, and Geraci, US 2500825 and US 2501168 (both 1950 to Am. Cyanamid); Geraci, US 2766240 (1956 to Aries Labs.). Properties:  Precipitate from hot water.  Sol in dil NaOH solns.  |