Simple and compound acid anhydride.

[1] *SOC CHIM, B SOC CHIM, V13, P330

[2] CHEM SOC, V37, P481

[3] ANN CHEM, V132, P141

[4] 1887, BER DTSCH CHEM GES, V20, P3188

[5] 1894, BER DTSCH CHEM GES, V27, P1715

[6] GAZ CHIM ITAL, V24, P259

[7] ANN CHIM PHYS, V20, P411

[8] 1866, Z CHEM, P362

[9] ANN CHEM, V161, P179

[10] ANN CHEM, V190, P129

[1] *SOC CHIM, B SOC CHIM, V13, P330

[2] CHEM SOC, V37, P481

[3] ANN CHEM, V132, P141

[4] 1887, BER DTSCH CHEM GES, V20, P3188

[5] 1894, BER DTSCH CHEM GES, V27, P1715

[6] GAZ CHIM ITAL, V24, P259

[7] ANN CHIM PHYS, V20, P411

[8] 1866, Z CHEM, P362

[9] ANN CHEM, V161, P179

[10] ANN CHEM, V190, P129