| 540 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
| 1 | DF | .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6} |
| 121 | DF | .~.~ Azaporphyrins {1} |
| 122 |  | .~.~.~ Phthalocyanines {8} |
| 123 | DF | .~.~.~.~> Hetero ring attached directly or indirectly to the phthalocyanine ring system by nonionic bonding {2} |
| 128 | DF | .~.~.~.~> Boron, germanium, phosphorus or silicon containing |
| 129 | DF | .~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to ring carbon of the phthalocyanine ring system (e.g., tetracarboxy copper phthalocyanine, etc.) |
| 130 | DF | .~.~.~.~> Having -C(=X)-, wherein X is chalcogen, attached indirectly to ring carbon of the phthalocyanine ring system by nonionic bonding (e.g., phthalocyanine acetic acids, etc.) |
| 131 | DF | .~.~.~.~> Sulfonyl bonded directly to ring carbon of the phthalocyanine ring system {2} |
| 135 | DF | .~.~.~.~> Nitrogen attached indirectly to ring carbon of the phthalocyanine ring system by acyclic nonionic bonding |
| 136 | DF | .~.~.~.~> Halogen bonded directly to ring carbon of the phthalocyanine ring system {2} |
| 139 | DF | .~.~.~.~> Metal containing {1} |