(L-Val(6))-TA 6-L-Valine-tyrocidine A 6-Valine-tyrocidine A 79774-98-4 Gramicidin S, 5-D-phenylalanine-6-L-asparagine-7-L-glutamine-8-L-tyrosine-, monohydrochloride Tyrocidine A, 9-L-valine-, monohydrochloride Val-TA