00000nz  a2200000n  4500
001  KSH1997000770
005  19970627004708
008  970627 n azknn|abn          |a a|a    | 
150  ▼a단일 결합[單一結合]▲
450  ▼a단결합[單結合]▲
450  ▼wr▼i영어▼asingle bond▲
550  ▼wg▼a화학 결합[化學結合]▲
550  ▼a컨주게이션[conjugation]▲