Paragraph 4
Ferrocene derivatives, as follows:
a.
Butacene (CAS 125856-62-4);
b.
Catocene (2,2-bis-ethylferrocenyl propane) (CAS 37206-42-1);
c.
Ferrocene carboxylic acids;
d.
n-butyl-ferrocene (CAS 319904-29-7);
e.
Other adducted polymer ferrocene derivatives;