Photoresist Chemicals L-Leucine, L-seryl-L-leucyl-L-glutaminyl-L-tyrosyl-L-leucyl-L-alanyl-L-isoleucyl-L-lysyl-L- alanyl-L-tryptophyl-L-alanyl-L-arginyl-L-glutaminyl-L-glutaminyl- Cas:919479-37-1 Molecular Formula:C83H133N23O21