Chemotherapy drugs
Where each cytotoxic drug came from, why it was looked for, which cancers it was developed for and a few things worth knowing, with every claim traced to a source. Drugs are linked only where a source says one was derived from another or that they were given together.
54 drugs in 6 classes, first described 1844 to 1998. 37 with a recorded approval; median 13 years from first description to first approval. 0 regimens.
Each row is a class of drug. A filled mark is the year a drug was first described; an open mark and a thin line show the year of its first recorded approval. Arrows join a drug to the earlier drug it was derived from.