Multiple choice Which among the following is a synthetic S-acyl derivative of thiamine? Adenosine thiamine diphosphate Adenosine thiamine triphosphate Allithiamine Benfotiamine Reveal answer Fill a bubble to check yourself D Correct answer Explanation Benfotiamine is a synthetic S-acyl derivative of thiamine (vitamin B1). After absorption, benfotiamine can be dephosphorylated by cells bearing an ecto-alkaline phosphatase to the lipid-soluble S-benzoylthiamine.