sentence: Their structures were determined by spectroscopic methods as saikogenin D ( 1 ) , prosaikogenin D ( 2 ) , saikosaponins B 2 ( 3 ) , W ( 4 ) , B 1 ( 5 ) , Y ( 6 ) , D ( 7 ) , A ( 8 ) , E ( 9 ) , B 4 ( 10 ) , B 3 ( 11 ) , and T ( 12 ) , saikodiyne A ( 13 ) , D ( 14 ) , E ( 15 ) and F ( 16 ) , falcarindiol ( 17 ) , and 1-linoleoyl-sn-glycero-3-phosphorylcholine ( 18 ) .