What type of collection does Etarcomol and Medb have in common?
Etarcomol Etarconol is a character from the Ulster Cycle in Irish folklore. He is the son of Eda and Léthrenn and a foster-son of Ailill and Medb. He was the first champion to face Cúchulainn in single combat. He was killed as Cúchulainn struck down through his crown and split him "to the navel".
3-Mercapto-3-methylbutan-1-ol 3-Mercapto-3-methylbutan-1-ol, also known as MMB, is a thiol and an alcohol. MMB is a degradation product of the amino acid felinine in cat urine and is a cat pheromone.