This refers to cobalt ions in the +2 oxidation state, which typically have two electrons in their outermost shell.
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(4-METHOXY-PHENYLAMINO)-ACETIC ACID HYDRAZIDE
2-Biphenylcarboxaldehyde
(S)-2-amino-3-phenyl-N-[(R)-1-phenylethyl]propanamide
Co(4-nitrobenzoate)2(pyridine)2(H2O)2