Nitrenes substituted with hydrocarbyl sulfanyl groups, . Sulfenyl nitrenes is an older synonymous term. E.g. MeSN methylsulfanylnitrene or methylthionitrene. The synonymous term thiazynes (from the third canonical form; confusable with the hetarynes derivable from 1,2- and 1,4-thiazine) is best avoided.