| 摘要 |
A phosphorylated derivative of L-dopa of the formula <IMAGE> wherein when X is <IMAGE> wherein Z is -CH2, N, S or a linkage other than oxygen which renders the phosphate group resistant to hydrolysis by phosphatase enzymes in tissues and biological fluids, then Y is OQ, wherein Q is H or an alkyl with one to twelve carbon atoms, or wherein X is OQ, then Y is <IMAGE> wherein R' is hydrogen or a pharmaceutically acceptable cation and R is a moiety which increases hydropobicity. The phosphorylated derivative of L-dopa is useful as an agent to increase the melanin content in mammalian skin and hair.
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