The present invention relates to a compound of formula (I), or a pharmaceutically acceptable salt or acid addition salt thereof, a racemic mixture, or a corresponding enantiomer and / or optical isomer and / or stereoisomer thereof: (I) In this formula, Y is N or CR &apos；； R 1 ' is hydrogen or F； R 1 is hydrogen, halogen, or lower alkyl substituted by halogen； R <； 2 >； is hydrogen or lower alkyl； R 2 together with R 4 form a 6-membered heterocyclic ring containing -CH 2 -CH 2 -O-CH 2 - or -CH 2 -CH 2 -NR-C (O) -, Lower alkyl, phenyl or benzyl； R <； 3 >； is phenyl or pyridinyl, the N atom in the pyridinyl group may be in different positions； R 4 ' is hydrogen, lower alkyl or lower alkoxyalkyl； R 4 is hydrogen, lower alkyl, phenyl optionally substituted by halogen, or lower alkoxy, or is cycloalkyl, pyridinyl optionally substituted by halogen, lower alkyl, lower alkoxy or ═O, or is lower alkyl, Pyridinyl, pyridinyl, pyridazinyl which is optionally substituted by lower alkyl, lower alkoxy or = O, or 1-methylpyrrolo [2 , 3-b] pyridin-5-yl, or 6-imidazo [l, 2-b] pyridazin-6-yl； R 4 together with R 4 ' represents - (CH 2 ) 5 -, -CH 2 -CH 2 -O-CH 2 -CH 2 -, -CH 2 -CH 2 -CH 2 -, -CH 2 -CH 2 - Form a 4-membered, 5-membered or 6-membered heterocyclic ring containing a group CH 2 -CH 2 -, -CH 2 -O-CH 2 -CH 2 - or CH 2 -CH 2 -CH 2 -O-CH 2 ； R 5 and R 5 ' are hydrogen or lower alkyl； R 4 together with R 5 form a saturated five-membered ring containing -CH 2 -CH 2 -CH 2 -. The compounds may be used for the treatment of Parkinson's disease, anxiety, vomiting, obsessive compulsive disorder, autism, neuroprotection, cancer, depression or type 2 diabetes.본 발명은 하기 화학식 I의 화합물 또는 이의 약학적으로 허용되는 염 또는 산부가 염, 라세미체 혼합물, 또는 이의 상응하는 거울상 이성질체 및/또는 광학 이성질체 및/또는 입체 이성질체에 관한 것이다:
