Dihydroxydibutylether (DHBE) is a cholereticdrug used for the treatment of gallstone and hepatic disorders due to its choleretic activity and hepatoprotective action. The drug is a mixture of three regioisomers. The main regioisomer 3‐(3‐hydroxylbutoxy)‐1‐butanol (III) contains four stereoisomers, including (R)‐3‐((R)‐3‐hydroxylbutoxy)‐1‐butanol (IIIa), (R)‐3‐((S)‐3‐hydroxylbutoxy)‐1‐butanol (IIIb)