26645-35-2 AIDS-004494 AIDS004494 Cyclo(L-alanyl-2-mercapto-L-tryptophanyl-4,5-dihydroxy-L-leucyl-L-valyl-erythro-3-hydroxy-D-.alpha.-aspartyl-L-cysteinyl-cis-4-hydroxy-L-prolyl, cyclic (2, 6)-sulfide Phallacidin