Specific mechanical energy–An essential parameter in the processing of amorphous solid dispersions

SA Thompson, RO Williams III - Advanced Drug Delivery Reviews, 2021 - Elsevier
Specific mechanical energy (SME) is a frequently overlooked but essential parameter of hot-
melt extrusion (HME). It can determine whether an amorphous solid dispersion (ASD) can …

19F Solid-state NMR characterization of pharmaceutical solids

Y Du, Y Su - Solid State Nuclear Magnetic Resonance, 2022 - Elsevier
Solid-state NMR has been increasingly recognized as a high-resolution and versatile
spectroscopic tool to characterize drug substances and products. However, the analysis of …

Indomethacin polymorph δ revealed to be two plastically bendable crystal forms by 3D electron diffraction: Correcting a 47‐year‐old misunderstanding

M Lightowler, S Li, X Ou, X Zou, M Lu… - Angewandte …, 2022 - Wiley Online Library
Indomethacin is a clinically classical non‐steroidal anti‐inflammatory drug that has been
marketed since 1965. The third polymorph, Form δ, was discovered by both melt and …

Ritonavir Revisited: Melt Crystallization Can Easily Find the Late-Appearing Polymorph II and Unexpectedly Discover a New Polymorph III

S Li, B Liu, Z Chen, X Ou, H Rong… - Molecular Pharmaceutics, 2023 - ACS Publications
Identification of a thermodynamically stable polymorph is an important step in the early stage
of drug development. Ritonavir (RIT) is a well-known case where the most stable polymorph …

Polymorphism in griseofulvin: new story between an old drug and polyethylene glycol

X Ou, S Li, Y Chen, H Rong, A Li, M Lu - Crystal Growth & Design, 2022 - ACS Publications
Griseofulvin (GSF) is a clinically used antifungal drug that was reported to have three true
polymorphs (Forms I–III) over the past eight decades. Here, we present the discovery of two …

Ultrafast magic angle spinning NMR characterization of pharmaceutical solid polymorphism: a posaconazole example

Y Du, D Frank, Z Chen, J Struppe, Y Su - Journal of Magnetic Resonance, 2023 - Elsevier
Protons represent the most NMR-sensitive nucleus in pharmaceutical compounds.
Therefore, proton-detected solid-state NMR techniques under fast magic angle spinning are …

Insights into Factors Affecting Ethylene-Vinyl Acetate Copolymer Crystallinity in Islatravir Implant

X Zhu, A Punia, D Skomski, Y Su, CS Shultz… - Molecular …, 2024 - ACS Publications
Islatravir, a highly potent nucleoside reverse transcriptase translocation inhibitor (NRTTI) for
the treatment of HIV, has great potential to be formulated as ethylene-vinyl acetate (EVA) …

Crystallization process development for the final step of the biocatalytic synthesis of Islatravir: Comprehensive crystal engineering for a low-dose drug

E Sirota, T Kwok, RJ Varsolona… - … Process Research & …, 2021 - ACS Publications
Islatravir (MK-8591), a highly potent nucleoside reverse transcriptase translocation inhibitor,
is being developed to stem the spread of global HIV infections. Following a nine-enzyme in …

Islatravir Dimer: Crystal Form Dependence of a Radiation-Induced Degradation Product

JE Topolski, AM Confer, M Hu, A Brunskill… - Molecular …, 2024 - ACS Publications
A rare example of crystal form-dependent, gamma radiation-induced degradation is
presented. Islatravir is known to exist in several polymorphic forms, but only one of these …

Solid-State Dehydration Mechanism of Diclofenac Sodium Salt Hydrates

H Oyama, T Miyamoto, A Sekine, I Nugrahani… - Crystals, 2021 - mdpi.com
Salt formation is a useful technique for improving the solubility of active pharmaceutical
ingredients (APIs). For instance, a nonsteroidal anti-inflammatory drug, diclofenac (DIC), is …