(4R-cis)-6-Hydroxymethyl-2,2-dimethyl-1,3-dioxane-4-aceticacid, 1,1-dimethylethyl ester CAS:124665-09-0 (4R-cis)-6-Áu¼×»ù-2,2¶þ¼×»ù-1,3-¶þÑõÁùh-4-ÒÒËáÊå¶¡õ¥