... -7-13-20(18,4)5/h6,8-9,11-12,14H,7,10,13H2,1-5H3,(H,21,22)/p ... -1/b9-6+,12-11+,15-8+,16-14-Melting point174-177°CMolecular StructureFunction1 ... .Strong and fast restrain skin from proliferation and differentiation process function. 4.Clinical used for other drug treatment of invalid serious ... keep us informed ,thanksContacts: Jessica GuoMobile: +86 13633781413 MOQ Isotretinoin 99%