Patent ID: 8658838

Claim:
A method for preventing or treating diseases or conditions related to the overproduction or uneven distribution of melanin, the method comprising administering to a subject a composition comprising a compound having the following formula III: or a pharmaceutically acceptable salt thereof, wherein: R 1 is H or C 1 -C 10 alkyl; and R 2 is phenyl, 4-hydroxyphenyl, 4-methoxyphenyl, 3,4-dioxalanephenyl, 2,4-dihydroxyphenyl, 2,4-dimethoxyphenyl, 3,5-dimethoxyphenyl, 2,4-dimethoxy-3-methylphenyl, 2,4,6-trimethoxyphenyl, furan-3-yl, tetrahydrofuran-3-yl, furan-2-yl, tetrahydrofuran-2-yl; 5-ethylfuran-2-yl or pyridin-3-yl.