23961
ESI - MS revealed that the most abundant A . bestiarum LPS glycoforms have a hexa - acylated or tetra - acylated lipid A with conserved architecture of the backbone , consisting of a 1 , 4 ' - bisphosphorylated beta - ( 1 --> 6 ) - linked d - GlcN disaccharide with an AraN residue as a non - stoichiometric substituent and a core oligosaccharide composed of Kdo1Hep6Hex1HexN1P1 .
 Chemical: 1 , 4 ' - bisphosphorylated beta - ( 1 --> 6 ) - linked d - GlcN disaccharide; Chemical: AraN
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: 1 , 4 ' - bisphosphorylated beta - ( 1 --> 6 ) - linked d - GlcN disaccharide; Chemical: AraN