(N-(4-Amino-4-deoxy-N(10)-methylpteroyl)amino)-3-chloro-4,5-dihydro-5-isoxazoleacetic acid 108743-20-0 5-Isoxazoleacetic acid, 3-chloro-alpha-((4-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)amino)-4,5-dihydro-, (S-(R*,R*))- Meapa-acivicin