| 549 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
| * | DD | .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {2} |
| 200 |  | .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16} |
| 201 | DF | .~.~.~> With preservative or stabilizer {4} |
| 206 | DF | .~.~.~> Heavy metal or aluminum containing {5} |
| 213 | DF | .~.~.~> Boron containing |
| 214 | DF | .~.~.~> Silicon containing {1} |
| 216 | DF | .~.~.~> Phosphorus bonded directly to the hetero ring {1} |
| 218 | DF | .~.~.~> Phosphorus attached indirectly to the hetero ring by nonionic bonding {4} |
| 223 | DF | .~.~.~> Xanthene ring system having a benzene ring bonded directly thereto para to the xanthene ring oxygen, wherein the carbon of a -COO- group is bonded directly to the benzene ring ortho to its position of attachment to the xanthene ring system, and spirolactone derivatives thereof (e.g., fluoresceins, chlorofluorans, etc.) {2} |
| 228 | DF | .~.~.~> The hetero ring contains -O-C(=X)-O- as part of its structure, wherein X is chalcogen (e.g., cyclic carbonates, etc.) {1} |
| 231 | DF | .~.~.~> Cyclic anhydrides (i.e., -C(=X)OC(=X)-, wherein the X's are the same or diverse chalcogens, is part of the hetero ring) {2} |
| 263 | DF | .~.~.~> Lactones (i.e., -C(=X)O-, wherein X is chalcogen, is part of the hetero ring) {6} |
| 330 | DF | .~.~.~> Spiro {1} |
| 346 | DF | .~.~.~> The hetero ring has at least seven members {2} |
| 356 | DF | .~.~.~> The hetero ring is six-membered {9} |
| 429 | DF | .~.~.~> The hetero ring is five-membered {14} |
| 510 | DF | .~.~.~> The hetero ring is four-membered {1} |
| 512 | DF | .~.~.~> The hetero ring is three-membered consisting of one oxygen and two carbons {7} |