I was a 19th century German chemist. I was the first to synthesize isobutyric acid, guanide, creatine, creatinine, and tyrosine. I also discovered an important rule about alcohols, which is named after me. But that's not what my name makes most people think of! It's the clever flask I invented! And I bet they can't even remember my full name, much less spell it right. Who am I?