This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Tolcapone. Tolcapone structure taken from Lednicer's The Organic Chemistry of Drug Synthesis Volume Drawn in ChemDraw using ACS settings by User Walkerma December Antiparkinsonian agents own assumed Walkerma
Page 2023 Free-images.com. All images are Public Domain