(Z)-butanethial oxide => (E)-but-1-en-1-SO-peroxol
(z)-butanethial oxide => (e)-but-1-en-1-so-peroxol
(Z)-butanethial oxide => (E)-but-1-en-1-SO-peroxol
(z)-butanethial oxide => (e)-but-1-en-1-so-peroxol