Photoresist Chemicals L-Phenylalanine, N-[N-[N-[N-[(2-nitrophenyl)thio]-L-methionyl]-L-a-glutamyl]-L-histidyl]-, 1-(1,1-dimethylethyl) 5-(phenylmethyl) ester Cas:61342-67-4 Molecular Formula:C42H51N7O9S2