562 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
* | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {41} |
400 | DF | .~ Carboxylic acids and salts thereof {14} |
401 | DF | .~.~ Racemization or separation of optical isomers {1} |
402 | .~.~.~ Physical resolution |