New cinnamic acid salts of salmeterol useful for the treatment of e.g. chronic obstructive pulmonary disease

摘要

Cinnamic acid salts of salmeterol (I) are new. Cinnamic acid salts of formula (I) are new. R1 and R2 = H, 1-4C alkyl, 1-4C alkoxy, halo, -CF3 or phenyl; R1+R2 (when adjacent) = -CH=CH-CH=CH-bridge; R3 = H, 1-4C alkyl, 1-4C alkoxy, halo or -CF3.