Ignore reactions where we know that names were extracted incorrectly

[avaucher]

Imported from internal issue number 102 (Feb 2022).

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For instance: "methylacetophenone" is assigned CCC(=O)c1ccccc1, which is not correct.

In this case, the best thing is probably to remove the full reaction record.

Note: it is unclear if this filtering step should be done in this repo or in another one...