Patent ID: 7189736

Claim:
A compound of the formula 1, in which R1 is methyl, R2 is methyl, R3 is hydrogen, one of the substituents R4a and R4b is hydrogen and the other is 1–4C-alkoxy or 1–4C-alkoxy-1–4C-alkoxy, R5a is the radical —OR′, R5b is hydrogen, R6 is hydrogen, R7 is hydrogen and X is O (oxygen) or NH, and where R′ is selected from the group consisting of —C(O)—NR8R9, —C(O)-alk-NR8R9, —C(O)-alk-C(O)—NR8R9, —P(O)(OH)2, —S(O)2NR8R9, —C(O)—R8, —C(O)—C6H3R10R11, —C(O)—OR8, —C(O)-alk-C(O)—R8, —C(O)-alk-C(O)—OR8, —C(O)—C(O)—R8, and —C(O)—C(O)—OR8, where alk is 1–7C-alkylene, R8 is hydrogen, 1–10C-alkyl or 1–4C-alkyl substituted by halogen, carboxyl, hydroxyl, sulfo (—SO3H), sulfamoyl (—SO2NH2), carbamoyl (—CONH2), 1–4C-alkoxy or 1–4C-alkoxycarbonyl, R9 is hydrogen or 1–4C-alkyl, R10 is hydrogen, halogen, nitro, 1–4C-alkyl, 1–4C-alkoxy, 1–4C-alkoxycarbonyl, 1–4C-alkoxycarbonylamino, 1–4C-alkoxy-1–4C-alkoxycarbonylamino or trifluoromethyl and R11 is hydrogen, halogen, 1–4C-alkyl or 1–4C-alkoxy, with the proviso that when R5a is the radical —OR′ and R′ is COR8 then R8 is a member selected from the group consisting of hydrogen, a 1–4C-alkyl substituted by halogen, carboxyl, hydroxyl, sulfo (—SO3H), sulfamoyl (—SO2NH2), carbamoyl (—CONH2), 1–40-alkoxy, and a 1–4C-alkoxycarbonyl or a solvate, salt, or solvate of a salt thereof.