Term Name:	precorrin-3B
Synonyms:	3,3',3'',3'''-(7S,8S,12S,13S,14R,15S)-2,7,12,18-tetrakis(2-carboxyethyl)-3,8,17-tris(carboxymethyl)-15-hydroxy-8,13,15-trimethyl-7,8,12,13,14,15,20,24-octahydroporphyrin-13(1),14-carbolactone, Precorrin 3B
Definition:	The intermediate in the biosynthesis of vitamin B12 from uroporphyrinogen III in which three methyl groups have been introduced at positions 2, 7 and 20 of the tetrapyrrole framework and in which the carboxymethyl group at position 2 has been oxidised to form a lactone ring.
Ontology:	ChEBI [CHEBI:27711]  ( EBI )