In the previous communication [I ] we have described an original method for the synthesis of tetraamines of type I, in which the methylene groups in radical B are partly replaced by aromatic fragments: ... It was demonstrated that these substances possess a selec- tive affinity to the M2 subtype of cholinoreceptors [I], and it was established that at least one of the synthesized com- pounds [XIII: Ar=Ph, A=(CH2)6, B = 1,4-C6H4(CH2)2] was superior in selectivity as ...