Complex sentence: Monsanto's last commercially relevant United States patent on glyphosate expired in 2000, since when glyphosate has been marketed by many agrochemical companies, in different solution strengths and with various adjuvants, under dozens of tradenames.
Split into simpler sentences: Monsanto's last commercially relevant United States patent on glyphosate expired in 2000. Glyphosate has since been marketed by many agrochemical companies, in different solution strengths and with various adjuvants, under dozens of tradenames.