P270：Do not eat, drink or smoke when using this product.
P301+P312：IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P501：Dispose of contents/container to..…
Description
4-Hydroxycoumarin is involved in annulation reactions, due to the relatively high acidity of the C-H bond at the 3-position: a three-component reaction with isocyanides and dialkyl acetylene dicarboxylates affords annulated 4H-pyrans.
