| 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 |  | .~.~.~.~ Hetero ring is one of the cyclos of the polycyclo ring system {8} |
| 49 | DF | .~.~.~.~.~> The hetero ring contains nitrogen {3} |
| 59 | DF | .~.~.~.~.~> The hetero ring contains sulfur |
| 60 | DF | .~.~.~.~.~> The hetero ring is a cyclic anhydride (i.e., containing -C(=X)-O-C(=Y)- as part of the ring, wherein X and Y are chalcogen; e.g., 5,8-maleic anhydride adduct of 5,7,9(11)-pregnatrien-3,20-di-one, etc.) |
| 61 | DF | .~.~.~.~.~> The hetero ring contains plural oxygens {2} |
| 72 | DF | .~.~.~.~.~> The hetero ring is a lactone (i.e., containing -C(=X)-O- as part of the ring, wherein X is chalcogen) {2} |
| 76 | DF | .~.~.~.~.~> The hetero ring is three-membered consisting of one oxygen and two carbons (e.g., oxirane, etc.) {9} |
| 90 | DF | .~.~.~.~.~> The hetero ring shares at least three ring members with one other cyclo of the polycyclo ring system (i.e., bridged) {2} |
| 93 | DF | .~.~.~.~.~> The hetero ring shares a ring carbon with two other cyclos of the polycyclo ring system (e.g., peri-fused, etc.) |