| 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} |
| 440 | DF | .~.~.~ Carbonyl attached indirectly to the cyano group by nonionic bonding (e.g., aldehydes, ketones, etc.) {2} |
| 441 |  | .~.~.~.~ Oxygen bonded directly to the carbonyl group (e.g., carboxylic acid esters, etc.) {3} |
| 442 | DF | .~.~.~.~.~> Additional carbonyl attached indirectly to the cyano group by nonionic bonding |
| 443 | DF | .~.~.~.~.~> The cyano group is bonded directly to the carbon adjacent to the carbonyl carbon (e.g., alpha cyano acrylates, etc.) |
| 444 | DF | .~.~.~.~.~> The oxygen is between the carbonyl and the cyano group (e.g., cyano is in the alcohol portion of a carboxylic acid ester, etc.) |