Synthesis and “in vitro” cardiovascular activity of 4-aryl-2,3,3a,4-tetrahydro-1h-pyrrolo[2,1-c][1,4]benzothiazin-1-ones and 7-acetoxy-6-phenyl-7a,8,9,10-tetrahydropyrrolo [2,1,-d][1,5]benzothiazepin-10-one.