Patent ID: 7019028

Claim:
A compound of the formula (I) wherein R 1 and R 2 together are —O—CH 2 —O—, R 4 is CO 2 R 3 , CO 2 NHR 3 , CHO, CH 2 OR 3 , CH 2 OSi(R 3 ) 3 , CH 2 Br, CH 2 CN, wherein R 3 is, 1.0 H or 2.0 a C 1 –C 6 -alkyl, C 2 –C 6 -alkenyl, C 2 –C 6 -alkynyl or C 6 –C 10 -aryl group, in which alkyl, alkenyl and alkynyl are straight-chain or branched, and in which the alkyl, alkenyl and alkynyl groups are further mono- or disubstituted by: 2.1 —OH, 2.2 ═O, 2.3 —O—C 1 –C 6 -alkyl in which alkyl is straight-chain or branched, 2.4 —O—C 2 –C 6 -alkenyl in which alkenyl is straight-chain or branched, 2.5 —C 6 –C 10 -aryl, 2.6 —NH—C 1 –C 6 -alkyl in which alkyl is straight-chain or branched, 2.7 —NH—C 2 –C 6 -alkenyl in which alkenyl is straight-chain or branched, 2.8 —NH 2 or 2.9 halogen, and in which the aryl groups are further mono- or disubstituted by substituents 2.1 or 2.3 to 2.9, in which the substituents 2.3, 2.4, 2.6 and 2.7 are further substituted by —CN, -amide or -oxime functions, and 2.5 are further substituted —CN or amide, or a stereoisomeric form of the compound of the formula (I) or a physiologically tolerated salt of the compound of the formula (I) or a salt of a stereoisomeric form of the compound of the formula (I) provided R4 is not CO2H.