2104-L-I 2A-D-Alloisoleucine-2B-D-alloisoleucine actinomycino-D 6156-47-4 AY 3 Actinomycin AY1 Actinomycin C3 Actinomycin D, 2(sup A)-D-alloisoleucine-2(sup B)-D-alloisoleucine- Actinomycin I3 Actinomycin vii Aurathin-A3 NSC 87222 NSC-87222