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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Trends Parasitol. 2019 Nov 29;36(2):182–194. doi: 10.1016/j.pt.2019.11.002

Figure I. Praziquantel (PZQ) Stereochemistry.

Figure I.

PZQ is chiral, existing in two enantiomeric forms [laevo or (R)-PZQ (red); dextro or (S)-PZQ (blue, mirrored)]. (R)-PZQ causes rapid paralysis of adult schistosome worms (‘corkscrewed’ phenotype). (R)-PZQ also causes rapid damage to the worm’s surface.