| 560 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {17} |
| 330 | DF | .~ Isocyanate esters (i.e., compounds containing the isocyanate group, -N=C=O, bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {7} |
| 336 | DF | .~.~ Processes {6} |
| 351 | | .~.~.~ Processes of reacting isocyanate esters of known structure to yield products of indeterminate structure |