p. 7381 - 7388
(1993)13-(2,4-Dinitro-phenylazo)-30-hydroxy-3,6,9,17,20,23-hexaoxa-tricyclo[23.3.1.111,15]triaconta-1(29),11,13,15(30),25,27-hexaene-29-carboxylic acid
27-[(2,4-Dinitro-phenyl)-hydrazono]-13,30-dimethoxy-3,6,9,17,20,23-hexaoxa-tricyclo[23.3.1.111,15]triaconta-1(28),11,13,15(30),25-pentaen-29-one
13-[(2,4-Dinitro-phenyl)-hydrazono]-30-oxo-3,6,9,17,20,23-hexaoxa-tricyclo[23.3.1.111,15]triaconta-1(28),11,14,25(29),26-pentaene-29-carboxylic acid methyl ester
13-(2,4-Dinitro-phenylazo)-30-hydroxy-3,6,9,17,20,23-hexaoxa-tricyclo[23.3.1.111,15]triaconta-1(29),11,13,15(30),25,27-hexaene-29-carboxylic acid methyl ester
13-[(2,4-Dinitro-phenyl)-hydrazono]-30-oxo-3,6,9,17,20,23-hexaoxa-tricyclo[23.3.1.111,15]triaconta-1(28),11,14,25(29),26-pentaene-29-carboxylic acid