> All of the labs that work with ritonavir are contaminated by a more stable form ("polymorph") that rapidly converts any ritonavir crystals into a less-useful

> All of the labs that work with ritonavir are contaminated by a more stable form ("polymorph") that rapidly converts any ritonavir crystals into a less-useful form. The incredible case of the disappearing polymorphs: https://en.wikipedia.org/wiki/Disappearing_polymorphs https://en.wikipedia.org/wiki/Disappearing_polymorphs It's an actual virulent molecule!