| 552 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
|
| * |  | ORGANIC COMPOUNDS (Class 532, subclass 1) {11} |
| 1 | DF | .~> Azides {8} |
| 100 | DF | .~> Acyclic carbon bonded directly to three benzene rings and to cyano (e.g., triphenylacetonitrile, etc.) |
| 101 | DF | .~> Acyclic carbon bonded directly to three benzene rings or to two benzene rings and a cyclohexadienyl ring, which acyclic carbon may not be bonded to a fourth carbon (e.g., triphenylmethane dyestuffs, etc.) {12} |
| 200 | DF | .~> Tetracyclo naphthacene configured ring system having at least one double bond between ring members and having oxygen bonded directly to a carbon of an interior ring which carbon is a member of one ring only {2} |
| 208 | DF | .~> Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly at the 9- and 10-positions (e.g., anthraquinones, etc.) {19} |
| 271 | DF | .~> Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded direct at the 9- or 10-position (e.g., anthrones, anthranois, etc.) {10} |
| 291 | DF | .~> Cyclohexadiene having atoms double bonded directly at the 1- and 2- positions (e.g., orthoquinones, etc.) {1} |
| 293 | DF | .~> Cyclohexadiene having atoms double bonded directly at the 1- and 4- positions (e.g., paraquinones, etc.) {11} |
| 500 | DF | .~> Cyclopentanohydrophenanthrene ring system wherein two nonadjacent carbons of the ring system are bonded directly to each other (e.g., 3,5 cyclocholesterols, 3,5-cycloandrostanes, etc.) {1} |
| 502 | DF | .~> Cyclopentanohydrophenanthrene ring system containing {21} |
| 653 | DF | .~> 9,10-Seco-cyclopentanohydrophenanthrene ring system or 9,10-seco cyclopentanohydrophenanthrene ring system having a bond between the 3- and 5-positions (e.g., vitamin D compounds, cholecalciferols, activated 7-dehydrocholesterols, dihydrotachysterols, 3,5 cyclovitamin D compounds, etc.) |