Disclosed are compounds of Formula 1, N-oxides, and salts thereof, ##STR00001## wherein J is ##STR00002## and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8a, R.sup.8b, R.sup.8c, G.sup.1, G.sup.2, G.sup.3, G.sup.4, G.sup.5, G.sup.6, Q.sup.1, Q.sup.2, Q.sup.3, Q.sup.4, W.sup.1, W.sup.2, Y.sup.1, Y.sup.2, Y.sup.3, m and n are as defined in the disclosure.Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling undesired vegetation comprising contacting the undesired vegetation or its environment with an effective amount of a compound or a composition of the invention.