piperidine

"Although he was unused to the situation, he tried to act naturally."

"It is very important to give your daughter independence in her life so she learns from experience."

"The liftoff will occur in exactly twelve seconds."

"Many medications are derivatives of natural substances found in plants or fungi. "

"Cyclohexane is a common alicyclic used in the production of nylon. "

"The box containing my old toys was stored in the attic. "

"The chemistry class focused on how different elements combine to form new substances. "

"The doctor prescribed pharmaceuticals to help control my daughter's allergies. "

"The science class experimented with different substances to see how they reacted to heat. "

"Many plants produce alkaloids, such as caffeine in coffee or morphine in poppies, which can affect the human body. "

"The air we breathe is mostly nitrogen. "

"He was dressed too formally for the occasion."