Derivatives of 4-(2-amino-1-hydroxyethyl)phenol as agonists of the β2 adrenergic receptor

A compound of formula (I):

• wherein:
• R1 is chosen from —CH2OH and —NHC(O)H;
• R2 is a hydrogen atom;
• R3 is chosen from a hydrogen atom, halogen atoms, —SO—R5, —SO2—R5, —NH—CO—NH2, CO—NH2, C1-4alkyl, C1-4alkoxy and —SO2NR5R6;
• R4 is chosen from a hydrogen atom, halogen atoms, and C1-4 alkyl groups;
• R5 is chosen from C1-4 alkyl groups and C3-8 cycloalkyl groups;
• R6 is independently chosen from a hydrogen atom and C1-4 alkyl groups;
• n, p and q are each independently 0, 1, 2, 3 or 4;
• m and s are each independently 0, 1, 2 or 3;
• and
• r is 0, 1 or 2
• with the provisos that:
• at least one of m and r is not 0
• the sum n+m+p+q+r+s is 7, 8, 9, 10, 11, 12 or 13
• the sum q+r+s is 2, 3, 4, 5 or 6
• or a pharmaceutically-acceptable salt or stereoisomer thereof.