A composite name for a polycyclic parent structure having the maximum number of non-cumulative double bonds and at least one ortho
fusion. Name formation involves the dissection of the structure into contiguous components having recognized trivial or semisystematic names, one of which is selected as the 'base component'. attachment of the other components is described by prefixes.
Blue Book Guide, p. 14 (https://doi.org/10.1351/pac199971071327)