| 558 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | 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} |
| 385 | ![]() | .~.~ Phosphorus attached indirectly to the cyano group by nonionic bonding {1} |
| 386 | DF | .~.~.~> Chalcogen, nitrogen, or halogen bonded directly to the phosphorus by nonionic bonding |