1,2,5,6-di-O-(1-methylethylidene)-α-D-glucofuranosyl-2-bromo-3-methyl butanoate

L-缬氨酸

2-bromo-3-methylbutyryl chloride

异戊酸

1,2;5,6-di-O-(1-methylethylidene)-α-D-glucofuranosyl 3-methyl butanoate