In this second part of "Dancing with
antivirals as chemical formulae" I will focus on a number of chemical compounds that in the last few years have elicited more than common attraction from a commercial viewpoint: (i)
favipiravir (T-705), as it is active against
influenza, but also several other RNA viruses; (ii)
neuraminidase inhibitors such as
zanamivir and
oseltamivir; (iii)
peramivir and
laninamivir octanoate, which might be effective against influenza virus following a single (intravenous or
inhalation) administration; (iv)
sofosbuvir, the (anticipated) cornerstone for the
interferon-free
therapy of HCV
infections; (v) combinations of DAAs (direct
antiviral agents) to achieve, in no time, a sustained virus response (SVR) against HCV
infection; (vi)
HIV protease inhibitors, the latest and most promising being
darunavir; (vii) the
integrase inhibitors (INIs) (
raltegravir,
elvitegravir,
dolutegravir), representing a new dimension in the anti-HIV armamentarium; (viii), a new class of helicase
primase inhibitors (HPIs) that may exceed
acyclovir and the other anti-herpes compounds in both potency and safety; (ix)
CMX-001, as the latest of Dr. Antonín Holý's legacy for its activity against poxviruses and CMV
infections, and (x) noroviruses for which the ideal
antiviral compounds are still awaited for.