What are some nine letter words with 1st letter P and 4th letter R and 8th letter N and 9th letter E?

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern P--R---NE. That is, nine letter words with 1st letter P and 4th letter R and 8th letter N and 9th letter E. In alphabetical order, they are:

pheromone

pieridine

pteridine