L-ANAP methyl ester is an esterified form of the fluorescent unnatural amino acid L-ANAP .1 It has been used in the synthesis of L-ANAP. L-ANAP methyl ester has also been used to fluorescently label proteins in vitro through genetic encoding.2
1.Xiang, Z., and Wang, L.Enantiospecific synthesis of genetically encodable fluorescent unnatural amino acid L-3-(6-acetylnaphthalen-2-ylamino)-2-aminopropanoic acidJ. Org. Chem.76(15)6367-6371(2011) 2.Berlin, J.R., Lopez, W., Jain, M.R., et al.Use of the methyl ester of a fluorescent unnatural amino acid to facilitate site-specific incorporation of fluorescent probes in proteinsBiophys. J.108(2)624A-625A(2015)