4021
The 17 compounds were bergenin ( 2 ) , emodin ( 3 ) , caffeic acid ( 4 ) , nobiletin ( 5 ) , 3 - O - beta - d - galactopyranosyl - hederagenin 28 - O - beta - d - xylopyranosyl ( 1 --> 6 ) - beta - d - galactopyranosyl ester ( 6 ) , coniferin ( 7 ) , qingyangshengenin ( 8 ) , methylconiferin ( 9 ) , syringaresinol 4 ' - O - beta - d - glucopyranoside ( 10 ) , gagaminine ( 11 ) , perlolyrine ( 12 ) , ( S ) - 1 - ( 1 ' - hydroxyethyl ) - beta - carboline ( 13 ) , 1 - ( beta - carboline - 1 - yl ) - 3 , 4 , 5 - trihydroxy - 1 - pentanone ( 14 ) , 1 - methoxycarbonyl - beta - carboline ( 15 ) , indolo [ 2 , 3 - alpha ] carbazole ( 16 ) , 4 - hydroxycinnamic acid methyl ester ( 17 ) , and methyl 4 - [ 2 - hydroxy - 2 - ( 4 - hydroxy - 3 - methoxyphenyl ) - 1 - ( hydroxymethyl ) ethyl ] ferulate ( 18 ) .
 bergenin, emodin, caffeic acid, nobiletin, 3 - O - beta - d - galactopyranosyl - hederagenin 28 - O - beta - d - xylopyranosyl ( 1 --> 6 ) - beta - d - galactopyranosyl ester, coniferin, qingyangshengenin, methylconiferin, syringaresinol 4 ' - O - beta - d - glucopyranoside, gagaminine, perlolyrine, ( S ) - 1 - ( 1 ' - hydroxyethyl ) - beta - carboline, 1 - ( beta - carboline - 1 - yl ) - 3 , 4 , 5 - trihydroxy - 1 - pentanone, 1 - methoxycarbonyl - beta - carboline, indolo [ 2 , 3 - alpha ] carbazole, 4 - hydroxycinnamic acid methyl ester, methyl 4 - [ 2 - hydroxy - 2 - ( 4 - hydroxy - 3 - methoxyphenyl ) - 1 - ( hydroxymethyl ) ethyl ] ferulate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 bergenin, emodin, caffeic acid, nobiletin, 3 - O - beta - d - galactopyranosyl - hederagenin 28 - O - beta - d - xylopyranosyl ( 1 --> 6 ) - beta - d - galactopyranosyl ester, coniferin, qingyangshengenin, methylconiferin, syringaresinol 4 ' - O - beta - d - glucopyranoside, gagaminine, perlolyrine, ( S ) - 1 - ( 1 ' - hydroxyethyl ) - beta - carboline, 1 - ( beta - carboline - 1 - yl ) - 3 , 4 , 5 - trihydroxy - 1 - pentanone, 1 - methoxycarbonyl - beta - carboline, indolo [ 2 , 3 - alpha ] carbazole, 4 - hydroxycinnamic acid methyl ester, methyl 4 - [ 2 - hydroxy - 2 - ( 4 - hydroxy - 3 - methoxyphenyl ) - 1 - ( hydroxymethyl ) ethyl ] ferulate