Retinol EP Impurity A

Chemical Name: ((1S,2R,5R,6S)-3,6-dimethyl-5-((1E,3E)-2-methyl-4-(2,6,6-trimethylcyclohex-1-en-1-yl)buta-1,3-dien-1-yl)-6-((1E,3E,5E)-4-methyl-6-(2,6,6-trimethylcyclohex-1-en-1-yl)hexa-1,3,5-trien-1-yl)cyclohex-3-ene-1,2-diyl)dimethanol