lactone

"The delivery was completed by four."

"Important types of property include real property (land), personal property (other physical possessions), and intellectual property (rights over artistic creations, inventions, etc.)."

"Ethanol is a hydroxy compound used in hand sanitizers. "

"I am still hoping that all will turn out well."

"The chemist synthesized a new drug by combining several different compounds. "

"The birds had built an amazing structure out of sticks and various discarded items."

"The scientist studied the intramolecular forces that caused the protein to fold into its specific shape. "

"The student derived the answer to the math problem from the formula. "

"The sweet smell of many fruits, like bananas and apples, is due to the presence of esters. "

"Her artistic talent is a unique gift in our family. "

"The scientist studied the effects of different types of soil on plant growth. "

"The weather had a cyclic pattern of rain and sun."