Especially beneficial is a dream about a big and well-equipped ship, this means that fat days are round the corner, and luck will re-enter your life. A dreaming of a ship is a good and happy sign. In addition to the positive changes in life, this dream will open your energy potential for productive activities. This dream foretells positive changes and improvement of well-being.
Prostaglandin E1: A naturally occuring prostaglandin E (PGE1) which displays a variety of pharmacologic actions. Alprostadil is a potent vasodilator agent that increases peripheral blood flow, inhibits platelet aggregation, and induces bronchodilation.
A quick Google search suggests that the most common form of phosphorus selenide is P4Se4. That would make the empirical formula PSe. Another form seems to be P4Se. You are completely correct about P commonly being +3 and Se -2.