Heteroaromatic compounds

A compound of Formula I or a physiologically compatible salt thereof,

• in which
• R1 is hydrogen, Ar, straight-chain or branched C1-C7 alkyl, which can be substituted with Ar or E, straight-chain or branched C2-C7 alkenyl, which can be substituted with Ar or E, C3-C7 cycloalkyl, which can be substituted with Ar or E, or C5-C7 cycloalkenyl, which can be substituted with Ar or E,
• Y is —(C═O)—(C═O)—, —SO2—, —(C═O)NH—, —(C═S)NH—, —(C═O)—(C═O)—O—, —(C═O)—(C═O)NH—, —(C═O)—O— or —SO2—NH—,
• R2 and R3 together with the N-atom form pyrrnlidinyl, [a 5- to 7-membered heterocycle, which can be saturated or unsaturated and] which can be substituted with C1-C4 alkyl and OH,
• X is oxadiazolyl,
• R4 is pyridinyl, straight-clhain or branched C1-C9 alkyl, straight-chain or branched C2-C9 alkenyl, C3-C7 cycloalkyl, or C5-C7 cycloalkenyl, wherein in each case the alkyl radical or the alkenyl radical is substituted with pyridinyl in one to two places, and
• Ar is a C6-C12 mono- or bicyclic aromatic compound, which optionally is partially hydrogenated and which can be substituted with E in one to three places, and
• E is halogen, hydroxy, nitro, CF3, CN, OCF3, amino, phenyl, methylenedioxy, phenoxy, benzyloxy, C1-C4 alkoxy or C1-C4 alkyl.