Between NUMBER@1 and NUMBER@2 , the MISC@1 chemists Sir PERSON@1 and Sir PERSON@2 and , independently , the MISC@2 chemist PERSON@3 , succeeded in synthesizing the vitamin , making it the first to be artificially produced .

In NUMBER@3 , the MISC@1 chemists Sir PERSON@1 and Sir PERSON@2 , and separately the MISC@2 PERSON@3 , had success in making the vitamin .
