| 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} |
| 452 |  | .~.~.~ Nitrogen attached indirectly to the cyano group by nonionic bonding {4} |
| 453 | DF | .~.~.~.~> Plural cyano groups bonded directly to the same carbon (e.g., malononitrile, tetracyanoethylene, etc.) |
| 454 | DF | .~.~.~.~> Plural cyano groups bonded directly to the same chain (e.g., adiponitrile, etc.) {3} |
| 458 | DF | .~.~.~.~> The nitrogen is attached directly to halogen by nonionic bonding, or is part of a nitro, nitroso, nitrate, or N-oxide group |
| 459 | DF | .~.~.~.~> Hydrogenation of dinitriles, or displacement of halo, hydroxy, or alkoxy by ammonia or substituted ammonia |