| 558 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {21} |
| 303 | DF | .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21} |
| 435 | DF | .~.~ Acyclic (e.g., purification of saturated nitriles, etc.) {9} |
| 447 |  | .~.~.~ Plural carbons bonded directly to the same oxygen {3} |
| 448 | DF | .~.~.~.~> Plurals oxygens bonded directly to the same carbon (e.g., acetals, etc.) |
| 449 | DF | .~.~.~.~> Cyano is attached directly or indirectly by nonionic bonding to carbon that is multiple bonded to another carbon |
| 450 | DF | .~.~.~.~> Processes for formation of an ether group (e.g., cyanoethylation of alcohols, etc.) |