马来酸酐 、
(4aS)-3,5t,6b-Trimethyl-(4ar,5ac,6ac,6bt)-4,4a,5,5a,6,6a,6b,7-octahydro-cycloprop[2,3]indeno[5,6-b]furan-4c-ol 在
乙醚 作用下,
生成 (1a
R)-7
c-hydroxy-1b,6,8
t-trimethyl-(1a
r,1b
t,7a
c,8a
c)-1a,1b,2,3,4,5,7,7a,8,8a-decahydro-1
H-2aξ,5ξ-epoxido-cyclopropa[3,4]cyclopenta[1,2-
b]naphthalene-3ξ,4ξ-dicarboxylic acid-anhydride