The majority of new chemical molecules that are tested as new grugs come from

Hey there,

 The synthesis of new chemicals by chemists.

Hope this helps :D

~Top♥

Atomicity occurs to prevent updates of the database occurring only partially, which can cause greater problems than rejecting the whole series outright.some are monatomic, diatomic, triatomic etc because it shows the number of atoms. for example, monatomic means it contains only one atom.