Selecting a stable solid form of remdesivir using microcrystal electron diffraction and crystal structure prediction† † Electronic supplementary information (ESI) available. CCDC 2061565, 2061566, 2061567 and 2061568. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/d1ra03100g

ABSTRACT

Therapeutic options in response to the coronavirus disease 2019 (COVID-19) outbreak are urgently needed. In this communication, we demonstrate how to support selection of a stable solid form of an antiviral drug remdesivir in quick time using the microcrystal electron diffraction (MicroED) technique and a cloud-based and artificial intelligence implemented crystal structure prediction platform. We present the MicroED structures of remdesivir forms II and IV and conclude that form II is more stable than form IV at ambient temperature in agreement with experimental observations. The combined experimental and theoretical study can serve as a template for formulation scientists in the pharmaceutical industry. Combining microcrystal electron diffraction (MicroED) and a cloud-based and artificial intelligence implemented crystal structure prediction (CSP) platform to support selection of a stable solid form of remdesivir in quick time.