Hanessian-Hullar reaction in the synthesis of highly substituted trans-3,4-dihydroxypyrrolidines: rhamnulose iminosugar mimics inhibit alpha-glucosidase by Liu, Z, Yoshihara, A, Jenkinson, SF, Wormald, MR, Kelly, C, Heap, JT, Marqvorsen, MHS, Estévez, RJ, Fleet, GWJ, Nakagawa, S, Izumori, K, Nash, RJ, Kato, A