Yes. These parameters are presented in the compound PK profile under the name of “Fu in vitro“. The specific in vitro system used to obtain the fu value is presented after the value, when available. You can use the following query to find such values of a specific compound: Monographs (located at the top panel of DIDB homepage) > PK profiles (link). The Fu in vitro values presented in the PK profile is usually available for newly marketed drugs obtained from the NDA reviews. Additionally, fu in vitro values are curated together with specific in vitro metabolism data if they are provided within the same citation. Thus, you may find the fu in vitro values of the drug of interest using an in vitro metabolism query, e.g., Km/Vmax/CLint. In the result, such values are presented in the column of “Fu in vitro“, when available.