0 B20R4.10042 c1ccc2c(c1)-c3c4c(cccc4[nH]n3)C2=O 537 [0,0,0,0,0,0|0,0,2]=2 1 B18R3.622457 c1ccc2c(c1)C(=O)c3ccccc3C2=O 9TA [1,0,1,0,0,0|1,0,1]=4