Another naturally occurring isomer of oleic acid is petroselinic acid. There is a double bond is conjugated as an isomer conjugated linoleic acid. It is the "ortho" isomer of the three isomeric benzenediols. Each glucose isomer is subject to rotational isomerism. It is a structural isomer of 1-propanol and ethyl methyl ether. It is the trans isomer of oleic acid. This salt is more soluble than the cis isomer. It is a constitutional isomer of dimethyl ether. It is also a "trans" isomer of oleic acid. Another isomer of CHO&colon; methoxyethane (ethyl-methyl-ether; III). Garden strawberries contain the dimeric ellagitannin agrimoniin which is an isomer of sanguiin H-6. The trans isomer, which is metastable, is also known. However, prolonged heating results in isomerization to the "exo" isomer. Effects vary with animal and xylene isomer. It is the enantiomeric partner of the (2"R",5"S") isomer&colon; (+)- or "d"-menthone.