| 549 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
|
| * | 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 | DF | .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16} |
| 206 |  | .~.~.~ Heavy metal or aluminum containing {5} |
| 207 | DF | .~.~.~.~> Arsenic containing |
| 208 | DF | .~.~.~.~> The hetero ring has three members or at least seven members |
| 209 | DF | .~.~.~.~> The metal is bonded directly to carbon, which carbon is a ring carbon of the hetero ring or which carbon is attached directly or indirectly to the hetero ring by nonionic bonding |
| 210 | DF | .~.~.~.~> The metal is bonded directly to chalcogen, which chalcogen is attached directly or indirectly to the hetero ring by nonionic bonding {1} |
| 212 | DF | .~.~.~.~> Polycyclo ring system having the hetero ring as one of the cyclos |