https://doi.org/10.1351/goldbook.T06348
A term including monothioacetals having the structure R2C(OR')(SR') (subclass monothioketals, R ≠ H); and dithioacetals having the structure R2C(SR')2 (subclass dithioketals, R ≠ H, R' ≠ H).
See also:
thiohemiacetals