stomach and intestines absorb is better 1.treatment of invalid severe acne 2.treatment of acne cystica 3.acneconglobata [Alias]A different dimension acid, different song for the ester, Paul skin Ling, β cis-retinoic acid, RO43780CAS 4759-48-2[Specification]99.9% [formula]C20H28O2 [Molecular weight]300.44 [Melting point]174-177 °C [Effectiveness of the role]Synthetic retinoid stereoisomers, better ...