The document discusses the issue of quality and accuracy of chemical structure information online. It presents ChemSpider, a platform for chemical structure data deposition, curation and linking to other online sources. ChemSpider aims to address the problem of incorrect and inconsistent chemical structure data across different websites through features like chemical structure markup, validation using InChI identifiers, and collaborative curation efforts. The goal is to build a single point of reference for reliable chemical structure information on the internet.