I believe a major component is formic acid.
The insect's sting's cure will be caused if we apply a soaked wet pad of ammonia water.
Mimesis. If you look like a stinging insect, other creatures treat you like a stinging insect, without the biological overhead of actually having to grow a stinger and produce toxin.
bee
Hornet
calamine lotion
Blood vessels will expand to keep the bite from bleeding. This expansion of blood vessels can irritate nerves that are nearby which causes the insect bites to sting and/or itch.
Wasp?
Tarantula Hawk Wasp
Red wasp.
Beijing food does not have a main ingredient. Anything could be the main ingredient. It depend on the food.
Sausage is the main ingredient.
Flour ( pasta ) is the main ingredient