BZ, -or more commonly known as QNB (quinuclidinyl benzilate) is not an indole compound. Niether is benztropine mesylate.
http://www.mitretek.org/home.nsf/homelandsecurity/SearchInfoChemWarAgts (http://www.mitretek.org/home.nsf/homelandsecurity/SearchInfoChemWarAgts)
(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000400863-file_fkxq.gif)