| 540 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
|
| * | 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} |
| 2 | DF | .~.~ Cyclopentanohydrophenanthrene ring system containing {10} |
| 47 | DF | .~.~.~ The cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos {1} |
| 48 | DF | .~.~.~.~ Hetero ring is one of the cyclos of the polycyclo ring system {8} |
| 61 | DF | .~.~.~.~.~ The hetero ring contains plural oxygens {2} |
| 63 |  | .~.~.~.~.~.~ The hetero ring is ortho-fused to the D ring {7} |
| 64 | DF | .~.~.~.~.~.~.~> At least six cyclos in the polycyclo ring system |
| 65 | DF | .~.~.~.~.~.~.~> Nitrogen or acyclic chalcogen bonded directly to the hetero ring (e.g., cyclic carbonates, etc.) |
| 66 | DF | .~.~.~.~.~.~.~> The A ring is a benzene ring |
| 67 | DF | .~.~.~.~.~.~.~> Sulfur or nitrogen attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by acyclic nonionic bonding |
| 68 | DF | .~.~.~.~.~.~.~> Halogen attached indirectly to the cyclopentanohydrophenanthrene ring system by acyclic nonionic bonding |
| 69 | DF | .~.~.~.~.~.~.~> Halogen bonded directly to the cyclopentanohydrophenanthrene ring system {1} |
| 71 | DF | .~.~.~.~.~.~.~> Oxygen attached directly to the B ring or indirectly to the A or B ring by acyclic nonionic bonding |