3,7,14,18-tetramethyl-1
t,20
t-bis-(2,6,6-trimethyl-cyclohex-1-enyl)-eicosa-1,3
t,5
t,7
t,13
t,15
t,17
t,19-octaene-9,11-diyne 在
platinum on activated charcoal 、
苯 作用下,
生成
3,7,14,18-tetramethyl-1t,20t-bis-(2,6,6-trimethyl-cyclohex-1-enyl)-eicosa-1,3t,5t,7t,9c,11c,13t,15t,17t,19-decaene