p. 2961 - 2965
(1986)p. 193 - 196
(1974)p. 3889 - 3892
(2007/10/02)diazoacetic acid ethyl ester
(6aR,9aS)-2,5,6,6a,7,8,9,9a-Octahydro-1H-cyclohepta[jkl]-as-indacene
glutaric anhydride,
(6-Hydroxy-2,6,7,8,9,9a-hexahydro-1H-benzo[cd]azulen-6-yl)-acetic acid ethyl ester
1,5,6,6a,7,8-Hexahydro-cyclohepta[jkl]-as-indacen-2-one