5-{(2R)-2-[(2R)-2-(3-Chloro-phenyl)-2-hydroxy-ethylamino]-propyl}-benzo[1,3]dioxole-2,2-dicarboxylic aicd bis-(5-methyl-[1,3]dioxan-5-ylmethyl) ester (HCID 131721287)|Huagongshe