75831-97-9 Antibiotic DC 11A2 DC-11-42 Tetrocarcin A, 4(sup C)-O-de(2,3,6-trideoxy-alpha-L-erythro-hexopyranosyl)- Tetrocarcin A, 4C-O-de(2,3,6-trideoxy-alpha-L-erythro-hexopyranosyl)- Tetrocarcin B