Cyclic Thioether Compound, Vegetable Oil Composition Containing the Same, Their Preparation and Application Thereof

A cyclic thioether compound, having a structure represented by the following formula (I):

• wherein in the formula (I), R1 is selected from optionally substituted C1-20, C2-10, C4-8 or C6-7 linear or branched hydrocarbyl groups (such as optionally substituted C1-20, C2-10, C4-8 or C6-7 linear or branched alkyl groups, optionally substituted C2-20, C2-10, C4-8 or C6-7 linear or branched alkenyl groups, or optionally substituted C2-20, C2-10, C4-8 or C6-7 linear or branched alkynyl groups), R2 is selected from single bond and optionally substituted C1-20, C2-10, C4-8 or C6-7 linear or branched hydrocarbylene groups (such as optionally substituted C1-20, C2-10, C4-8 or C6-7 linear or branched alkylene groups, optionally substituted C2-20, C2-10, C4-8 or C6-7 linear or branched alkenylene groups, or optionally substituted C2-20, C2-10, C4-8 or C6-7 linear or branched alkynylene groups), and the sum of the numbers of carbon atoms of R1 and R2 is 3 or more (preferably 3-35, more preferably 5-25 or 11-13).