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} |
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} |
72 | DF | .~.~.~.~.~ The hetero ring is a lactone (i.e., containing -C(=X)-O- as part of the ring, wherein X is chalcogen) {2} |
75 | | .~.~.~.~.~.~ The lactone ring shares a ring carbon with two other cyclos of the polycyclo ring system (e.g., peri-fused, etc.) |