R-2.4.5 Cyclophanes The term "cyclophanes" applies to cyclic systems consisting of ring(s) or ring system(s) having the maximum number of noncumulative double bonds connected by saturated and/or
unsaturated chains. Names for cyclophanes are formed by the operation of replacing a single atom of a cyclic parent "phane" structure by a cyclic structure.
Example to R-2.4.5
R-2.4.6 Natural product parent hydrides
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