Complex sentence: In the late 1990s, the agave syrup on the market contained 90% thermally or chemically hydrolyzed fructose, the salmiana variety syrup on the market today is still primarily fructose, but is enzymatically hydrolyzed using a black mold enzyme.
Split into simpler sentences: In the late 1990s, the agave syrup on the market contained 90% thermally or chemically hydrolyzed fructose. However, while the salmiana variety syrup on the market today is still primarily fructose, it is enzymatically hydrolyzed using a black mold enzyme.