11. The preparation of the isomeric compound sporol involved a similar dioxolane formation. 12. Today, there are even more isomeric forms available. 13. The four isomers of " butyl acetate " demonstrate these four isomeric configurations. 14. This tan or yellow crystalline solid is one of the three isomeric cyclohexanediones. 15. It is a mixture of two isomeric sesquiterpene lactones, alantolactone and isoalantolactone. 16. The term isomeric SMILES is also applied to SMILES in which isotopes are specified. 17. Another name for this relationship, used by Howard, is " isomeric ". 18. Rarely, left atrial isomeric patients have a single, normal, functional spleen. 19. It is the " ortho " isomer of the three isomeric benzenediols. 20. They were assigned to 8 " and 16 + K-isomeric levels.