Firefly luciferin2591-17-5100 % similar Luciferin EF103404-75-773 % similar D-Luciferin potassium salt115144-35-973 % similar Procysteine19771-63-238 % similar N-Acetyl-dl-tyrosine2901-77-136 % similar N-Acetyl-L-tyrosine537-55-336 % similar Benzylmercapturic acid19542-77-936 % similar N,S-Diacetylcysteine18725-37-636 % similar N,N′-Diacetyl-L-cystine5545-17-533 % similar N-(2-Chloroacetyl)-L-tyrosine1145-56-833 % similar Glycyl-L-tyrosine658-79-733 % similar N-[(Phenylmethoxy)carbonyl]-S-(phenylmethyl)-L-cysteine3257-18-932 % similar N,N′-Bis[(phenylmethoxy)carbonyl]-L-cystine6968-11-232 % similar L-Alanyl-L-tyrosine3061-88-931 % similar N-tert-Butoxycarbonyl-S-benzyl-L-cysteine5068-28-031 % similar Boc-L-tyrosine3978-80-131 % similar Carbobenzoxy-L-tyrosine1164-16-530 % similar S-Phenyl-N-[(phenylmethoxy)carbonyl]-L-cysteine159453-24-430 % similar L-Valyl-L-tyrosine3061-91-430 % similar (-)-N-Acetylphenylalanine10172-89-130 % similar