Extend names.rq for additional chemical roles

[DeniseSl22]

While working on the DSMN-figures, some WD-IDs didn't have a name connected to them (for which I used the names.rq query).
Examples (which we could use to extend the query):

• https://www.wikidata.org/wiki/Q190143 wd:p31 https://www.wikidata.org/wiki/Q55662747 (pair of enationmers)
• Q27104412, Q27108980, Q36461529, Q50362394 (same reason as above)
• Q50980 (xanthine) --> Has "instance of" "chemical compound", but not found with names.rq query (not sure why); same for Q48318 (urea)

[DeniseSl22]

See 43d5a37 , first testing in developers branch