“…of Lys, Arg, Tyr, Met, His and Trp, include anisole, thioanisole, dithioethane, indoles and others, see ref. A recent need for kilogram amounts of highly pure and chirally homogeneous Z-Lys(Boc)-OH required modification of literature procedures [53][54][55]. 72-5. m-Cresol has been recommended recently [46].…”