What is ChemSpider?
ChemSpider links together compound information across the web, providing free text and structure search access of millions of chemical structures.
With an abundance of additional property information, tools to upload, curate and use the data, and integration to a multitude of other online services, ChemSpider is the richest single source of structure-based chemistry information.
ChemSpider is owned by the RSC and provided as a free resource to the community.
Many people suffer from hay-fever in the summer months. Many antihistamine pharmaceutical agents are used as treatments including Cetirizine, Loratidine, Levocetirizine, Desloratadine and Fexofenadine.