共 7 条
[1]
BEALL FH, 1924, Patent No. 1488730
[2]
BENGTSSON EB, Patent No. 136396
[3]
BURROWS LA, Patent No. 655074
[4]
COBLENTZ V, 1920, Patent No. 1332028
[5]
FITTIG R, 1861, ANNALEN, V120, P214
[6]
LEGGE DIJ, 1947, J AM CHEM SOC, V69, P2088
[7]
SACHSSE H, Patent No. 216091