1. A compound having a structure or a pharmaceutically acceptable salt, solvate or hydrate thereof, a prodrug or metabolite thereof, wherein each of R and R is independently hydrogen or (Ci-C4) alkyl and R4 is hydrogen, (C1-C4) alkyl, halo (CC) alkyl, (C1-C4) aryl, halo (C1-C4) aryl or (C1-C4) heteroaryl. A compound according to claim 1, wherein each of R and R is independently hydrogen or methyl and R & lt 1 & gt is hydrogen, methyl, trifluoromethyl, phenyl, 4-bromophenyl, 2-furyl or 2-pyridyl. A compound according to claim 2, wherein each of R and R is independently hydrogen and R & lt 1 & gt is hydrogen, methyl, trifluoromethyl, phenyl, 4-bromophenyl, 2-furyl or 2-pyridyl. A compound according to claim 2, wherein R4 is methyl and each R and R independently represents hydrogen. A compound according to claim 2, wherein R & lt 3 & gt is hydrogen and each R and R independently represents methyl. The compound according to claim 2, wherein the compound is selected from the group consisting of 2- (2-amino-6-oxo-1,6-dihydropurin-9-ylmethoxy) -3-hydroxypropyl ester of 1-aminocyclopropanecarboxylic acid, 2- (2-amino -6-oxo-1,6-dihydropurin-9-ylmethoxy) -3-hydroxypropyl ester of 1-amino-2- (4-bromophenyl) -cyclopropanecarboxylic acid, 2- (2-amino-6-oxo- (2-amino-6-oxo-1,6-dihydropurin-9-ylmethoxy) -3-hydroxypropyl ester of 1-amino- 2-methylcyclopropanecarboxylic acid, 2- (2-amino-6-oxo-1,6 -dihydropurin-9-ylmethoxy) -3-hydroxypropyl ester of 1-amino-2-trifluoromethylcyclopropanecarboxylic acid, 2- (2-amino-6-oxo-1,6-dihydropurin-9-ylmethoxy) -3-hydroxypropyl ester of 1-amino -2-furan-2-yl-cyclopropanecarboxylic acid and 2- (2-amino-6-oxo-1, 6-dihydropurin-9-ylmethoxy) -3-hydroxypropyl ester of 1-amino-2-pyridin-2-yl-cyclopropanecarboxylic acid. Sosedi1. Соединение, имеющее структуруили его фармацевтически приемлемая соль, сольват или гидрат, пролекарство или метаболит, гдекаждый Rx и Rz независимо представляет собой водород или (С1-С6)алкил иRy представляет собой водород, (
