| abstract |
Compound of formula (I) ** Formula ** in which R represents hydrogen, (C1-C6) alkyl, (C1-C6) alkanoyl, (C1-C6) alkoxycarbonyl, (C1-C6) mono or dialkylaminocarbonyl, benzoyl or heteroaroyl, where benzoyl and heteroaroyl may be substituted by their part with halogen, cyano, (C1-C4) alkyl or (C1-C4) alkoxy, as well as their salts, solvates and solvates of the salts. |