9065
Here , iron L - edge X - ray absorption spectroscopy , interpreted using a valence bond configuration interaction multiplet model , is applied to directly probe the electronic structure of the iron in the biomimetic Fe - O ( 2 ) heme complex [ Fe ( pfp ) ( 1 - MeIm ) O ( 2 ) ] ( pfp ( " picket fence porphyrin " ) = meso - tetra ( alpha , alpha , alpha , alpha - o - pivalamidophenyl ) porphyrin or TpivPP ) .
 Chemical: iron; Chemical: iron; Chemical: Fe; Chemical: O ( 2 ); Chemical: heme; Chemical: [ Fe ( pfp ) ( 1 - MeIm ) O ( 2 ) ]; Chemical: pfp; Chemical: picket fence porphyrin; Chemical: meso - tetra ( alpha , alpha , alpha , alpha - o - pivalamidophenyl ) porphyrin; Chemical: TpivPP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: iron; Chemical: iron; Chemical: Fe; Chemical: O ( 2 ); Chemical: heme; Chemical: [ Fe ( pfp ) ( 1 - MeIm ) O ( 2 ) ]; Chemical: pfp; Chemical: picket fence porphyrin; Chemical: meso - tetra ( alpha , alpha , alpha , alpha - o - pivalamidophenyl ) porphyrin; Chemical: TpivPP