In a previous paper2 from these laboratories there was reported a number of substituted 3- phenylpropylamines which were found later to have principally a musculotropic type of activity. In an attempt to increase their musculotropic properties further study has been made in this series. Into the 3-position of the phenylpropylamines was introduced phenyl, cyclohexyl, cyclopentyl, n-hexyl, isobutyl, o-methdyl and isobutenyl groups. The various ...