Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Maprotiline:

"

Maprotiline is very similar in structure to the anxiolytic, sedative, and muscle relaxant drug benzoctamine (Tacitin).[1][4] The only structural difference between the two compounds is in the length of their side chain.[1][4] However, this modification results in considerable differences in their pharmacological and therapeutic effects.[1][4]