| 536 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES | 
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} | 
| 1.11 | DF | .~ Carbohydrates or derivatives {15} | 
| 18.7 | DF | .~.~ Nitrogen containing {13} | 
| 22.1 | DF | .~.~.~ N-glycosides, polymers thereof, metal derivatives (e.g., nucleic acids, oligonucleotides, etc.) {12} | 
| 23.1 | DF | .~.~.~.~ DNA or RNA fragments or modified forms thereof (e.g., genes, etc.) {9} | 
| 23.7 | DF | .~.~.~.~.~ Encodes a microbial polypeptide {3} | 
| 23.72 |  | .~.~.~.~.~.~ Viral protein |