Some observations on pyrrole and oxypyrrole.

[1] Zincke T, 1912, LIEBIGS ANN CHEM, V391, P55

[2] 1913, CHEM BER, V46, P1363

[3] 1886, CHEM BER, V19, P2184

[4] 1887, CHEM BER, V20, P3052

[5] 1920, CHEM BER, V53, P1666

[6] 1890, LIEBIGS ANN CHEM, V260, P137

[7] 1912, CHEM BER, V45, P1579

[8] 1916, LIEBIGS ANN, V411, P250

[9] 1890, CHEM BER, V23, P850

[10] 1913, LIEBIGS ANN, V400, P142

[1] Zincke T, 1912, LIEBIGS ANN CHEM, V391, P55

[2] 1913, CHEM BER, V46, P1363

[3] 1886, CHEM BER, V19, P2184

[4] 1887, CHEM BER, V20, P3052

[5] 1920, CHEM BER, V53, P1666

[6] 1890, LIEBIGS ANN CHEM, V260, P137

[7] 1912, CHEM BER, V45, P1579

[8] 1916, LIEBIGS ANN, V411, P250

[9] 1890, CHEM BER, V23, P850

[10] 1913, LIEBIGS ANN, V400, P142