Assume for the purposes of this problem that, to be an alcohol (-ol) or an amine (-amine), the hydroxyl or amino group must be bonded to a tetrahedral (sp3 hybridized) carbon atom. Write the structural formula of a compound with an unbranched chain of five carbon atoms that is an alkynone.
If more than one compound fits the description, draw them all.
Be sure to consider double bond stereochemistry.