Synthesis and Evaluation of 6,7-Dihydroxy-2,3,4,8,9,13b-hexahydro-1H-benzo6,7cyclohepta1,2,3-ef3benzazepine, 6,7-Dihydroxy-1,2,3,4,8,12b-hexahydroanthr10,4a,4-cdazepine, and 10-(Aminomethyl)-9,10-dihydro-1,2-dihydroxyanthracene as Conformationally Restricted Analogs of .beta.-Phenyldopamine