、
9,10-dimethyl-9,10-ethano-9,10-dihydro-2,3,6,7-tetrahydroxy-anthracene 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
反应 288.0h,
以8%的产率得到1,18,21,38-Tetramethyl-5,8,11,14,25,28,31,34,42,45,48,51,58,61,64,67-hexadecaoxaundecacyclo[36.32.2.02,37.04,35.015,24.017,22.018,55.021,54.039,70.041,68.052,57]doheptaconta-2,4(35),15(24),16,22,36,39,41(68),52(57),53,55,69-dodecaene