| abstract |
THE PRESENT INVENTION PROVIDES AN AGENT FOR INHIBITING SKIN ERYTHEMA AND/OR SKIN PIGMENTATION, CONTAINING AT LEAST ONE SELECTED FROM THE GROUP CONSISTING OF THE CARBOSTYRIL DERIVATIVE AND SALT THEREOF REPRESENTED BY THE GENERAL FORMULA,@@( FORMULA 1 )@@(WHEREIN R1 IS A HYDROGEN ATOM, A LOWER ALKYL GROUP OT THE LIKE; R2 IS A HYDROGEN ATOM, A LOWER ALKYL GROUP, ALOWER ALKOXY GROUP OR THE LIKE; R3 AND R4 ARE LOWER ALKYL GROUPS WHICH MAY HAVE HYDROXYL GROUPS AS SUBSTITUENTS OR THE LIKE; THE CARBON-CARBON BOND BETWEEN 3- AND 4-POSITIONS IN THE CARBOSTYRIL SKELETON IS A SINGLE BOND OR DOUBLE BOND). |