generate questions: In chemical terms, the difference between hardwood and softwood is reflected in the composition of the constituent lignin. Hardwood lignin is primarily derived from sinapyl alcohol and coniferyl alcohol. Softwood lignin is mainly derived from coniferyl alcohol.
What component of wood determines whether it is hardwood or softwood? {sep_token} Which wood has lignin that comes primarily from one type of alcohol? {sep_token} Which type of alcohol mainly becomes softwood lignin? {sep_token} In addition to coniferyl alcohol, what other alcohol is in hardwood lignin? {sep_token} Which kind of wood contains lignin derived from two main alcohol sources? {sep_token}