  It is shown that bounds of all orders of derivative would follow from uniform
bounds for the metric and the torsion 1-form, for a flow in non-K\"ahler
geometry which can be interpreted as either a flow for the Type IIB string or
the Anomaly flow with source term and zero slope parameter. A key ingredient in
the proof is a formulation of this flow unifying it with the Ricci flow, which
was recently found.
