叶酸

2-amino-6[[2'(R)-(benzylamino)-3'-hydroxypropyl]amino]-5-nitro-4(3H)-pyrimidinone

2-amino-6-[[2'(R)-[N-(tert-butoxycarbonyl)-N-benzylamino]-3'-hydroxypropyl]amino]-5-nitro-4(3H)-pyrimidinone

tert-butyl (R)-(1-((2-amino-5-nitro-6-oxo-1,6-dihydropyrimidin-4-yl)amino)-3-oxopropan-2-yl)(benzyl)carbamate