A unique collection of 277 toxic substances for high throughput screening (HTS) and high content screening (HCS);Covers more than 150 targets related to immune diseases, neurological diseases, respiratory disorders, endocrine diseases, and cardiovascular diseases.Includes 222 drugs with certain studies on mechanisms of toxicity;Includes 89 natural products, most of which are effective ingredients of Chinese medicine and attractive for toxicological study.Structurally diverse, medicinally active, and cell permeable;NMR and HPLC validated to ensure high purity and quality;