共 9 条
[2]
HOLKER JR, 1955, J CHEM SOC, P579
[6]
KRETZSCH.K, 1969, TETRAHEDRON LETT, P3811
[7]
SZABO P, 1966, CR ACAD SCI C CHIM, V262, P513
[8]
VONEULER H, 1933, J LIEBIGS ANN CHEM, V505, P73