Main Reaction: Phenol + L-Cystine >> 4-Hydroxyphenyl-L-cysteine (4-L-PC)

Reference: PubMed ID: 12717077
Authors: Nishii R, Kawai K, Garcia Flores L 2nd, Kataoka H, Jinnouchi S, Nagamachi S, Arano Y, Tamura S
Title: A novel radiopharmaceutical for detection of malignant melanoma, based on melanin formation: 3-iodo-4-hydroxyphenyl-L-cysteine.
Published: 2003 May

Phenol + L-Cystine --> 4-Hydroxyphenyl-L-cysteine (4-L-PC)