process for the production of antibiotics 20798 rp and 27706 rp, and the antibiotic 27706 rp and compositions which contain it

摘要

Antibiotics 20,798 RP and 27,706 RP of the general formula: P P (WHEREIN R represents a hydrogen atom or a hydroxy group) or acid addition salts thereof are prepared by reduction of a corresponding compound wherein the --CHOH--CH.sub.2 --R group is replaced by ##EQU1## The antibiotics of general formula I have valuable anti- tumour properties; that wherein R is hydroxy (27,706 RP) is new.