FIELD: medicine, pharmaceutics.SUBSTANCE: invention relates to a compound of formula I where: R1 represents a group selected from among -CH2OH, -NH(CO)H while R2 represents a hydrogen atom or R1, together with R2, forms group -NH-C(O)-CH=CH- where the nitrogen atom is bonded to the carbon atom in the phenyl ring whereto R1 is bonded, the carbon atom bonded to the carbon atom in the phenyl ring whereto R2 is bonded; R3a and R3b are independently selected from the group consisting of hydrogen atoms and C1-4alkyl groups; X and Y are independently selected from the group consisting of an ordinary bond and an oxygen atom; n, m and q (each) independently have a value selected from among 0, 1, 2 and 3; p has a value selected from among 1, 2 and 3; R4 and R5 are independently selected from the group consisting of hydrogen atoms, a halogen atoms, C1-4alcoxy, -CONH2, -NHCONH2, -SR7, -SO2R7 where R7 represents C3-4cycloalkyl; R6 is selected from the group consisting of hydrogen atoms, a halogen atoms, C1-4 alkyl and C1-4alcoxy or its pharmaceutically acceptable salt or a stereoisomer thereof. Additionally, the invention relates to a pharmaceutical composition based on the compound with formula I and to a method for β2-adrenergic receptor activity modulation.EFFECT: produced are new 4-(2-amino-1-hydroxiethyl) phenol derivatives possessing the activity of β2-adrenergic receptor antagonists.22 cl, 32 exНастоящее изобретение относится к соединению формулы I, где R1 представляет собой группу, выбранную из -CH2OH, -NH(CO)H, и R2 представляет собой атом водорода; или R1 вместе с R2 образуют группу -NH-C(O)-CH=CH-, где атом азота связан с атомом углерода в фенильном кольце, с которым связан R1, и атом углерода связан с атомом углерода в фенильном кольце, с которым связан R2; R3a и R3b независимо выбраны из группы, состоящей из атомов водорода и С1-4алкильных групп; Х и Y независимо выбраны из группы, состоящей из простой связи и атома кислорода; n, m и q каждый независимо имеет зна