Learn Turkish: Misk ve lavanta esansı almadan edemedim. - I could not help but buy musk and lavender essence.

This sentence uses the structure -mAdAn edememek, which expresses a strong psychological urge you can't resist. Literally, almadan means "without buying" and edemedim means "I couldn't do" (using the inability suffix -eme-). Together, "I couldn't do without buying" translates naturally to the English idiom "I couldn't help but buy."

Could I use duramadım instead of edemedim in this sentence?

Yes, they are completely interchangeable here. You could easily say Misk ve lavanta esansı almadan duramadım (literally, "I couldn't stand/stay without buying"). Both verbs are standard and equally natural ways to complete this "cannot help but" structure.

Why is there an -ı at the end of esansı rather than just saying esans?

It is there to form a noun compound. The nouns misk (musk) and lavanta (lavender) describe the type of esans (essence). To link these nouns together in Turkish, you must add the possessive suffix -(s)ı to the final noun. It works like saying "musk and lavender their essence."

Where does the 'd' in edemedim come from if the verb is etmek?