Last seen in:
- L.A. Times Daily - May 19 2024
- L.A. Times Daily - Oct 9 2022
- Universal - Oct 28 2021
- The Washington Post - Nov 9 2020
- L.A. Times Daily - Nov 9 2020
- Eugene Sheffer - King Feature Syndicate - Aug 5 2017
- Premier Sunday - King Feature Syndicate - May 1 2016
- L.A. Times Daily - Dec 5 2015
- L.A. Times Daily - Jan 3 2015
- L.A. Times Daily - Nov 6 2013
Related Clues:
- Beta carotene, for one
- Chemistry exam topic, perhaps
- Particular form of an element
- Alanine or dioxin
- Phenanthrene, to anthracene
- Diethyl ether, to butanol
- Almost identical compound
- Glucose, to fructose
- Dating material
- Chemical 'twin'
- Carbon 13, e.g.
- Uranium 235, for example
- Fulminic acid, to cyanic acid
- Chemical kin
- Chemistry subject