Author contributions: C.R. conceived, designed, supervised, and analyzed experiments; E.W. conceived, designed, conducted, and analyzed biological syntheses, biochemical conjugations, and in vitro and in vivo experiments; T.R.B. Jr. conceived, designed, analyzed, and supervised chemical syntheses; C.G.N. conceived, designed, conducted, and analyzed chemical syntheses; J.Q. conducted and analyzed in vitro experiments; A.R.N. conducted and analyzed chemical syntheses and in vitro experiments;...