| 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} |
| 76 | DF | .~.~.~.~.~ The hetero ring is three-membered consisting of one oxygen and two carbons (e.g., oxirane, etc.) {9} |
| 84 | DF | .~.~.~.~.~.~ The hetero ring shares the 16,17-positions of the cyclopentanohydrophenanthrene ring system {2} |
| 85 |  | .~.~.~.~.~.~.~ Halogen bonded directly to the cyclopentanohydrophenanthrene ring system |