US PATENT SUBCLASS 552 / *
ORGANIC COMPOUNDS (Class 532, subclass 1)


Current as of: June, 1999
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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.)