The asphaltene RICO products include n-alkan acids, di-n-alkan acids, branched alkan acids, tricyclic terpan acids, hopanoic acids, steran acids and 4-methyl steran acids.

• 其RICO产物包括一元酸、二元酸、支链酸、三环萜烷酸、藿烷酸、甾烷酸和4甲基甾烷酸。键合在沥青质中的烷基侧链和生物标志物不易遭受生物降解作用,特别是甾烷与饱和烃中分布相似。