The availability of chemical information in structured data formats and open databases benefits not only researchers in chemistry itself but also scientific fields using chemical information such as medicine, pharmacy, material science, molecular biology and many more . Although substantial efforts exist to establish research data management infrastructures and open databases and repositories , most chemical information is still exclusively published in human-readable text and image formats in the literature. The manual extraction of information from the chemical literature is a time-consuming and error-prone process that can only yield the large amounts of data needed for deep learning applications, for example, when considerable amounts of human resources are employed.