65.1 - When the main chain of a compound that is to be treated by replacement nomenclature ends in -OR, -SR, -COOR, -CONHR, -CONR1R2, -NHR, or -NR1R2, that group may be named as an ether, sulfide, ester, substituted amide, or substituted amine group (as appropriate), provided that the chain of the group R, R1, or R2 does not contain a hetero atom.
See Recommendations'93 R-1.2.2
Examples to Rule C-65.1
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