共 8 条
[2]
Dressler M. L., 1970, J HETEROCYCLIC CHEM, V7, P1257
[5]
Popp F. D., 1968, ADV HETEROCYCLIC CHE, V9, P1
[6]
Popp F.D., 1979, ADV HETEROCYCL CHEM, V24, P187
[7]
POPP FD, 1980, HETEROCYCLES, V14, P1033