| 544 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, subclass 1) {1} |
| * | DD | .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1} |
| 1 | DF | .~.~ Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6} |
| 63 | DF | .~.~.~ Six-membered hetero ring consists of oxygen, nitrogen and carbon (e.g., 1,2-oxazines, etc) {8} |
| 98 | DF | .~.~.~.~ 1,4-Oxazines {2} |
| 106 |  | .~.~.~.~.~ Morpholines (i.e., fully hydrogenated 1,4-oxazines {10} |
| 107 | DF | .~.~.~.~.~.~> Addition salts of morpholine which is unsubstituted or hydrocarbyl substituted only {3} |
| 111 | DF | .~.~.~.~.~.~> Additional nitrogen containing hetero ring (e.g., thiazetidine, etc.) {5} |
| 145 | DF | .~.~.~.~.~.~> Sulfur containing hetero ring (e.g., thioxane, etc.) {1} |
| 147 | DF | .~.~.~.~.~.~> Additional oxygen containing hetero ring {3} |
| 154 | DF | .~.~.~.~.~.~> Polycyclo-carbocyclic ring system having at least three cyclos {1} |
| 157 | DF | .~.~.~.~.~.~> Phosphorus attached directly or indirectly to morpholine ring by nonionic bonding |
| 158 | DF | .~.~.~.~.~.~> Sulfur attached directly or indirectly to morpholine ring by nonionic bonding {2} |
| 162 | DF | .~.~.~.~.~.~> Nitrogen attached directed or indirectly to morpholine ring by nonionic bonding {4} |
| 170 | DF | .~.~.~.~.~.~> Oxygen attched directly or indirectly to morpholine ring by nonionic bonding {4} |
| 178 | DF | .~.~.~.~.~.~> N-hydrocarbyl morpholines |