| 548 / | 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) {4} |
| 100 | DF | .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18} |
| 101 |  | .~.~.~ Heavy metal or aluminum containing {8} |
| 102 | DF | .~.~.~.~> Arsenic containing |
| 103 | DF | .~.~.~.~> The metal is bonded directly to carbon, which carbon is a ring carbon of the five-membered hetero ring or which carbon is attached directly or indirectly to the five-membered hetero ring by nonionic bonding |
| 104 | DF | .~.~.~.~> The metal is bonded directly to chalcogen of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens, which group is attached directly or indirectly to the five-membered hetero ring by nonionic bonding |
| 105 | DF | .~.~.~.~> The metal is bonded directly to chalcogen which chalcogen is attached directly to the five-membered hetero ring by nonionic bonding |
| 106 | DF | .~.~.~.~> The metal is bonded directly to chalcogen which chalcogen is attached indirectly to the five-membered hetero ring by nonionic bonding |
| 107 | DF | .~.~.~.~> The metal is in an anion and the five-membered hetero ring is in a cation |
| 108 | DF | .~.~.~.~> Polycyclo ring system having the five-membered hetero ring as one of the cyclos |
| 109 | DF | .~.~.~.~> Azide or acyclic nitrogen containing |