| http://www.w3.org/ns/prov#value | - A compound according to claim 1 wherein R1 is a phenyl substituted up to three times by halogen; C1-4alkyl; C1-4alkoxy; phenyloxy optionally substituted by the group A; benzyloxy; hydroxy; cyano; hydroxyC1-4alkyl; ???(CH2)h???NHCH3; ???(CH2)h???N(CH3)2; ???(CH2)hCONR22R23; ???(CH2)hCO(CH2)iNR22R23; ???(CH2)h???CO2R22; ???(CH2)hNR22COR23; ???(CH2)hOCOR22; ???(CH2)hOCONR22R23; ???(CH2)hNR22COOR23; ?
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