1. A compound of formula I: wherein Het is a bicyclic heteroaryl in which at least one atom in the ring is N and said heteroaryl is unsubstituted or substituted with one or more R substituents; where each R is independently hydroxyl, halogen, an amino group , cyano, nitro, C1-6alkyl, haloalkyl, C1-6alkoxy or halogenoalkoxy; X represents —CH — R—, where R is absent or represents —CH—, —O—, —S— or —NH—; one of W and Y represents NH, and the other represents O or NH; Z pred is O or S; R is —NRR; guanidino; monocyclic heteroaryl in which at least one atom in the ring is N, and said heteroaryl is unsubstituted or substituted with one or more R substituents; or monocyclic heterocycloalkyl in which at least one atom in the ring is N and said heterocycloalkyl is unsubstituted or substituted with one or more R substituents; where R and R each independently represent H or C 1-6 alkyl; each R represents independently hydroxyl, halogen , an amino group, a cyano group, a nitro group, C1-6alkyl, haloalkyl, C1-6 alkoxy or halogenoalkoxy; and each R independently is hydroxyl, halogen, amino, cyano, nitro, C1-6alkyl, haloalkyl, Calkoxy, haloCalkoxy, -C (O) Calkyl or -COCalkyl; n is 0, 1, 2, 3 or 4; R is absent or is hydroxyl, methoxy or trifluoromethoxy; and R 1 is C 1-6 alkyl, C 1 alkoxy or C 1-6 cycloalkoxy, wherein said cycloalkoxy is unsubstituted or substituted by one or more substituents independently selected from the group consisting of hydroxyl, halogen,1. Соединение формулы I:,где Het представляет собой бициклический гетероарил, в котором по меньшей мере один атом в кольце представляет собой N, и указанный гетероарил является незамещенным или замещен одним или несколькими заместителями R;где каждый Rнезависимо представляет собой гидроксил, галоген, аминогруппу, цианогруппу, нитрогруппу, Cалкил, галогеналкил, Cалкокси или галогенСалкокси;X представляет собой -CH-R-, где Rотсутствует или представляет собой -CH-, -О-, -S- или -NH-;один из W и Y представляет собой NH, и другой