4-ethynylbenzoic acid tert-butyl ester
4-chlorobenzoyl chloride
1,2-dihydro-2-oxonicotinic acid
methyl 5-<<4-(tert-butoxycarbonyl)phenyl>ethynyl>-2-chloro-3-pyridinecarboxylate
tert-butyl 4-<(trimethylsilyl)ethynyl>benzoate
(6RS)-5,10-dideaza-5,6,7,8-tetrahydrofolic acid
diethyl N-<4-<<2-(pivaloylamino)-4-hydroxy-5,6,7,8-tetrahydropyrido<2,3-d>pyrimidin-6-yl>ethyl>benzoyl>-L-glutamate
diethyl N-<4-<<2-(pivaloylamino)-4-hydroxypyrido<2,3-d>pyrimidin-6-yl>ethynyl>benzoyl>-L-glutamate
2-(pivaloylamino)-4-hydroxy-6-<(carboxyphenyl)ethynyl>pyrido<2,3-d>pyrimidine