Travoprost Related Compound A – (5Z,13E)-(9S,11R,15R)-9,11,15-trihydroxy-16-(m-trifluoromethylphenoxy)-17,18,19,20-tetranor-5,13-prostadienoic acid (solution in acetonitrile and water 50:50, v/v) (COLD SHIPMENT REQUIRED)