GB 1097270 appears to bee very nice - check it out.
"this invention relates toa process for the production methylenedioxybenzene 1,3 benzoathiole and related compounds."
making piperonal from OTC kinds of compounds.
whatcha think, eh?
OTEECEE & meeeee!!!!
|Re: mo USP||Bookmark|
This patent also corresponds to US Pat 3,436,403.