2-[2-(6-Hydroxy-2,7-dimethoxy-1,4-dioxo-1,4-dihydro-carbazol-9-yl)-acetylamino]-3-(4-hydroxy-phenyl)-propionic acid
Gly-(D-Tyr)
L-tyrosine
2-[2-[(E)-4-Dimethylamino-phenylimino]-2-(6-hydroxy-2,7-dimethoxy-1,4-dioxo-1,4-dihydro-carbazol-9-yl)-acetylamino]-3-(4-hydroxy-phenyl)-propionic acid
glycine