What is p-nitrophenyl chloroformate?

P-Nitrobenzene chloroformate is a protective reagent for hydroxyl and amino groups of nucleoside, an intermediate in organic synthesis and drug synthesis, and can be used to synthesize ritonavir (AIDS drug, protease inhibitor).

Chinese synonym: 4- nitrophenol chloromethyl ester; P-nitrophenyl chloroformate; P-nitrophenyl chloroformate; P-Nitrobenzene Chloroformic Acid; 4- nitrophenyl chloroformate (p-nitrophenyl chloroformate); 4- nitrophenyl chloroformate; 4- nitrophenyl chloroformate, p-nitrophenyl chloroformate; 4- nitrophenyl chloroformate (p-nitrophenyl chloroformate) (refrigerated); P-nitrophenyl chloroformate, 97%; P-nitrophenyl chloroformate; 95% p-nitrophenyl chloroformate/p-nitrophenyl chloroformate white powder.