(3E,5E,7E)-3,7-dimethyl-9-[(1Z)-2,6,6-trimethylcyclohex-2-enylidene]nona-1,3,5,7-tetraene (anhydro-vitamin A); Anhydro-Vitamin A; 6-((4E,6E)-3,7-dimethylnona-2,4,6,8-tetraen-1-ylidene)-1,5,5-trimethylcyclohex-1-ene; Retinol EP Impurity B; Vitamin A EP Impurity B;
