Compounds having the structure
ROC(=S)SH. Thus
O-esters of dithiocarbonic acid. Salts and esters of xanthic acid are xanthates. Use of this term is not recommended.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1374 (https://doi.org/10.1351/pac199567081307)