“…Chemicals and solvents used in the experiments were dimethyl sulfide, pent-1-en-3-one, 1-hexanethiol, ( Z )-hex-3-enal, 2,4-dithiapentane, oct-1-en-3-one, dimethyl trisulfide, ( Z )-hex-3-enol, 2-isopropyl-3-methoxypyrazine, methional, ( Z )-dec-4-enal, (2 E ,6 Z )-nona-2,6-dienal, tris(methylthio)methane, 3-phenylpropionaldehyde, β-ionone, 1 M lithium triethylborohydride in THF (Sigma-Aldrich Japan, Tokyo, Japan), carbon disulfide, THF (Junsei Chemical Co., Ltd., Tokyo, Japan), and methyl iodide (Tokyo Chemical Industry Co., Ltd., Tokyo, Japan). The following compounds were synthesized by using reported methods: hydrogen sulfide and methanethiol, hept-1-en-3-one, methylthiomethanethiol, 2,3,5-trithiahexane, methylthiomethyl dithioformate, 2,4,5,7-tetrathiaoctane, and 1,2,4,6-tetrathiepane . Methyl dithioformate was synthesized as described below.…”