Ecdysoside B (compound 6b) is a pregnane glycoside isolated from the plant Ecdysanthera rosea. This compound and its derivatives and isomers exhibit anticancer, immunosuppressive, and anti-inflammatory activities. Ecdysoside B demonstrates cytotoxicity against various human tumor cell lines, including PANC-1 (human pancreatic cancer cells), A375 (human melanoma cells), and U87 (glioblastoma U87 cells). It is a valuable compound for research in cancer, immunomodulation, and anti-inflammation.