Table 2. Comparative solubility of Pritelivir free and mesylate salt in the different excipients.

Excipient	Saturated solubility (mg ml–1)
	Pritelivir free base	Pritelivir mesylate salt
Ethanol	0.3	0.7
Isopropanol	0.4	BLOQ a
Benzyl alcohol	2.2	2.0
Phenoxyethanol	2.2	10.7
PEG 400	78.7	10.1
Dimethyl isosorbide	82.3	BLOQ
Propylene glycol	28.4	4.7
Transcutol P	44.8	1.3
Oleyl alcohol	0.1	BLOQ
Glycerin	0.5	13.1
Isopropyl myristate	0.1	— b
Isopropyl palmitate	BLOQ	—
Crodamol GTC	0.2	BLOQ

^aBLOQ: below limit of detection.

^bNo peak detected.