共 10 条
[1]
CLADER A, 1969, J CHEM SOC C, P512
[2]
HAN SY, 1985, HETEROCYCLES, V23, P1671
[3]
HARPP DN, 1974, TETRAHEDRON LETT, P3235
[9]
RINEHART KL, 1984, J AM CHEM SOC, V106, P1526