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Hot molecular cores and young
high-mass star-forming regions are well known laboratories of an extremely
rich chemistry. One of the so-far unkept promises of astrophysical
chemistry is the establishment of chemical clocks. Most observational
chemical inventories are based on single-dish studies averaging the
properties over the whole region. In contrast, recent (sub)mm
interferometric studies of selected young massive star-forming regions
showed the spatial differentiation and complexity between various
molecular species. Here, I will present the current stage of observational
high-spatial-resolution investigations of the chemical properties in
high-mass star-forming cores. Problems and promises of current and futures
studies will be discussed.
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