p. 6952 - 6958
(2010/01/16)10-(dimethylamino)-3-phenylmethoxy-spiro[7hbenzo[c]xanthene-7,1'(3'H)-isobenzofuran]-3'-one
10-(dimethylamino)-3-[(4-nitrophenyl)methoxy]-spiro-[7H-benzo[c]xanthene-7,1'(3'H)-isobenzofuran]-3'-one
10-(dimethylamino)-3-[(4-acetoxyphenyl)methoxy]-spiro-[7H-benzo[c]xanthene-7,10-(30H)-isobenzofuran]-30-one