"The primary outcome measure is not statistically tied to D."
It seems to be to me (and others). Unless I don't understand what you mean by "primary outcome".
From the PR: "All three Brilacidin treatment arms (two single-dose regimens and one three-day dose regimen) reached the primary endpoint, with the clinical success rate for each dosing regimen statistically comparable to the clinical success rate of the FDA-approved seven-day dosing regimen of daptomycin."