504 / | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS |
116 | DF | PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9} |
189 | DF | .~ Organic active compound containing {19} |
351 | DF | .~.~ Ethers {1} |
352 | .~.~.~ Plural benzene rings bonded directly to the same oxygen |