Complex sentence: There is no known scientific literature on IMP and it is not known to have ever been assayed by humans, but based on its close structural similarity to its "N"-demethylated analogue indanylaminopropane (IAP) it may have similar effects.
Split into simpler sentences: There is no known scientific literature on IMP and it is not known to have ever been assayed by humans. However, based on its close structural similarity to its "N"-demethylated analogue indanylaminopropane (IAP), IMP may have similar effects.