6-O-Methylbouvardin 70840-66-3 Bouvardin, 6-(3-hydroxy-N,O-dimethyl-L-tyrosine)- Cyclo(D-alanyl-L-seryl-N,O-dimethyl-L-tyrosyl-L-alanyl-N-methyl-L-tyrosyl-3-hydroxy-N,O-dimethyl-L-tyrosyl), cyclic (5(4)-6(3))-ether