This chemical is called Largomycin. With the CAS registry number of 79748-87-1, its classification codes are Drug / Therapeutic Agent; Natural Product. It's from streptomyces pluricolorescens; contains three fractions; MW 10,0000-20,000, 25,000 & 50,000, respectively and contains a chromophore; member of pluramycin class.
The toxicity data is as follows:
Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
mouse | LD50 | intraperitoneal | 35500ug/kg (35.5mg/kg) | | "Antibiotics: Origin, Nature, and Properties," Korzyoski, T., et al., eds., Washington, DC, American Soc. for Microbiology, 1978Vol. 2, Pg. 1351, 1978. |