558 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
* | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {21} |
59 | .~ Sulfite esters (i.e., compounds having the sulfite group, -O-S(=O)O-, bonded directly to at least one carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {1} | |
60 | DF | .~.~> Chalcogen attached indirectly to the sulfite group by acyclic nonionic bonding |