Adjectives ending in the sequence <-ane>, which is pronounced eɪn, tend to have the main stress on the final syllable. Here are some examples:
arcane germane humane inane mundane profane urbane
Nouns, on the other hand, tend to have the main stress on an earlier syllable. Examples:
ˈbutane ˈcellophane ˈmembrane ˈoctane ˈpropane
The ending is still pronounced eɪn, however.
The word hurricane is an exception. It is pronounced ˈhʌrɪkən.