18718
Phytochemical study on the constituents of the heartwood of Pterocarpus soyauxii led to the isolation of five new isoflavonoids and one new 3 - arylcoumarin , pterosonins A - F ( 1 - 6 ) , together with 17 known analogues , among which 8 , 9 , and 18 were reported as natural products for the first time .
 Chemical: isoflavonoids; Chemical: 3 - arylcoumarin; Chemical: pterosonins A - F
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: isoflavonoids; Chemical: 3 - arylcoumarin; Chemical: pterosonins A - F