| 558 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {21} |
| 230 | DF | .~ Esters having the thiocarboxylate group, -C(=X)X-, wherein the X's are the same or diverse chalcogens, with at least one X being sulfur, and wherein the single bonded X is bonded directly to an additional carbon, which carbon may be single bonded to any atom, but may be multiple bonded only to carbon {5} |
| 250 | DF | .~.~ The -C(=X)X- is -C(=O)S- {4} |
| 252 | DF | .~.~.~ Chalcogen attached indirectly to the -C(=O)S- group by acyclic nonionic bonding {1} |
| 253 |  | .~.~.~.~ The chalcogen, X, is in a -C(=X)- group {2} |
| 254 | DF | .~.~.~.~.~> Nitrogen bonded directly to the -C(=X)- group |
| 255 | DF | .~.~.~.~.~> The -C(=X)- group is part of a -COO- group |