527 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
* | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {6} |
300 | DF | .~ FROM CARBOHYDRATE OR DERIVATIVE AS A REACTANT {8} |
305 | DF | .~.~ With aldehyde or derivative as a reactant other than as an aldose {2} |
306 | .~.~.~ Ethylenically unsaturated reactant |