Complex sentence: Nicotine is a potent parasympathomimetic alkaloid found in the nightshade family of plants (Solanaceae) that acts as a nicotinic acetylcholine receptor agonist the biosynthesis takes place in the roots and accumulation occurs in the leaves of the Solanaceae.
Split into simpler sentences: Nicotine is a potent parasympathomimetic alkaloid found in the nightshade family of plants (Solanaceae) that acts as a nicotinic acetylcholine receptor agonist. The biosynthesis takes place in the roots and accumulation occurs in the leaves of the Solanaceae.