| 释义 | 
		pen·tyl \ˈpentə̇l\ noun (-s) Etymology: International Scientific Vocabulary penta- + -yl  : any of eight isomeric alkyl radicals C5H11 derived from the three pentanes by removal of one hydrogen atom: as  a.  : the normal radical CH3(CH2)3CH2− — called also amyl, n-amyl, n-pentyl  b.  : isopentyl  c.  : neopentyl |