R-188.8.131.52 A monocyclic hydrocarbon bridgeother than benzene is named by the same prefix as used as a fusion prefix (see R-2.4.1) preceded by "epi-". The bridge is assumed to have the maximum number of noncumulative double bonds consistent with the attachment to the fused ring and/or to other bridges. The positions of the free valences are indicated by the relevant locants in square brackets directly in front of the bridge name.
Examples to R-184.108.40.206
Methano Ethano Propano Butano Etheno Propeno Buteno Buteno But[1,3]dieno
R-220.127.116.11 Other cyclic hydrocarbon bridgeare named by prefixes derived from the unsaturated hydrocarbon name (see Table 20). Locants enclosed in square brackets are used as needed.
Examples to R-18.104.22.168
R-22.214.171.124 An acyclic heteroatomic bridgeis named by the appropriate prefix.
Examples to R-126.96.36.199
R-188.8.131.52 Heterocyclic bridgesare named by prefixes derived from the corresponding heterocyclic compound name (see Table 23). Locants enclosed in square brackets are used where necessary.
Examples to R-184.108.40.206
Examples to R-220.127.116.11
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