(4R-cis)-6-formaldehydel-2,2-dimethyl-1, 3-dioxane-4-acetic acid,1,1-dimethylethyl ester CAS No.: 124752-23-4 (4R-cis)-6-¼×È©»ù-2,2¶þ¼×»ù-1,3-¶þÑõÁù»·-4-ÒÒËáÊå¶¡õ¥