FIELD: organic chemistry, medicine, pharmacy.
SUBSTANCE: invention relates to compounds of the formula (I) 
wherein radicals R1, R2 and alk have values given in claim 1 of the invention claim. Compounds prepared by a method by claim 6 are important antagonists of 5-HT2A-receptors and can be sued in treatment psychosis, schizophrenia, depression, neurological disorders, memory disorders, Parkinson's diseases, amyotrophic lateral sclerosis, Alzheimer's disease, Huntington's chorea, nutritional disturbances, such as bulimia, nervous-psychic anorexia, premenstrual syndrome and/or for the positive effect on obsessive-compulsive disorder.
EFFECT: improved preparing method, valuable medicinal properties of compounds and pharmaceutical composition.
12 cl, 12 ex
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