A.1.8-11.8,C4H8O B.4.1-74.1,CH2OH C.2.8-62.8,C4H8O D.4.1-74.1,CH3CH2COCH3
A.5%,10% B.0.5%,5% C.5%,0.5% D.10%,0.5%
A.85 B.90 C.95 D.100