共 14 条
[1]
BECKER A, 1949, HELV CHIM ACTA, V32, P1587
[2]
JULIAN PL, 1952, HETEROCYCL COMPOUNDS, V3, P22
[3]
KNORR L, 1887, BER DTSCH CHEM GES, V20, P1096
[4]
PATTERSON AM, 1940, RING INDEX
[6]
VONDOBENECK HF, 1951, ANGEW CHEM-GER EDIT, V63, P469
[7]
1911, Patent No. 259504
[8]
1952, J CHEM SOC LONDON, P3592
[9]
1951, Patent No. 825410
[10]
330332