18.4
[1]. J L Kelley, et al. Synthesis and biological activity of an acyclic analogue of 5,,7,8-tetrahydrofolic acid, N-[4-[[-(,4-diamino-1,-dihydro--oxo-5- pyrimidinyl)propyl]amino]-benzoyl]-L-glutamic acid. J Med Chem. 199 Feb;():51-7.
H5
P1-P-P4-P41-P4-P4-P8-P7+P78-P51
GHS
199