HOMO-ISO-FLAVONOIDS
HomoIsoFlavones contain a Chroman-4-one structure (the two fused 6-membered rings on the left, one unsaturated, the one on the right saturated and with an =O side-group attached at the top).
These first four are not that different to the next three: just draw an extra bond on the lower three between the same point on the chromen-4-one as where the bridge across to the rightmost moiety joins to the point on the benzene moiety on the right below that where the bridge joins that. When you have done that, you will get the same 4-membered ring (a cycloButane ring) as the top 4 molecules.
Your Author regrets that he does not know the names of these compounds. Even the suffix is not a part of its name (it is just a number in a research paper showing which plant produces which compound).
Three more HomoIsoFlavones based upon chromen-4-one. There are a great many other HomoIsoFlavonoids fiffering only in their side-groups which are to be found in almost all genera of the Asparagaceae family, but these are the 7 reported to be in Grape-Hyacinth (Muscari neglectum) species. See Glory-in-the-Snow for some others.
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