(+/-)-6,7-diamino-3,4-dihydro-1'-[(1,2,3,4-tetrahydronapthalene)-2-yl]-spiro[(2H)-1-benzopyran-2,4'-piperidine]-4-one 生成 (+/-)-1-[(1,2,3,4-Tetrahydronapthalene)-2-yl]-7',8'-dihydro-8'-oxo-spiro[piperidine-4,6'(1'H)-pyrano[2,3-f]benzimidazole] dihydrochloride