Original: Between 1933 and 1934 , the British chemists Sir Walter Norman Haworth and Sir Edmund Hirst and , independently , the Polish chemist Tadeus Reichstein , succeeded in synthesizing the vitamin , making it the first to be artificially produced .
Simplified: In 1933/1934 , the British chemists Sir Walter Norman Haworth and Sir Edmund Hirst , and separately the Polish Tadeus Reichstein , had success in making the vitamin .