Many yerba mate enthusiasts insist that mateine is a different substance, a stereoisomer of caffeine, but that is impossible because caffeine is an achiral molecule with no chiral centers, and therefore has no stereoisomers.
That mateine is a different substance. This is what many yerba mate enthusiasts insist. That is impossible. This is what many yerba mate enthusiasts insist. Caffeine is an achiral molecule with no chiral centers. Many yerba mate enthusiasts therefore has no stereoisomers. A different substance is a stereoisomer of caffeine.