Amides of
sulfinic acids,
RS(=O)OH; thus
RS(=O)NR2, e.g.
PhS(=O)NHCH3N-methylbenzenesulfinamide.
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1368