brief, short
long

read (esp. BrE)
publish (esp. BrE)

be from, be taken from
The extract is taken from a long essay.

extract from
He read out a brief extract from his book.

natural
conditioners made from natural plant extracts

herbal
green tea, malt, meat, plant, root, yeast, etc.
almond, vanilla (both AmE) (almond, etc. essence in BrE)

extract of
extract of apricot