акридин, дибензопиридин, C13H9N
- acridine orange
"This is the precept by which I have lived: Prepare for the worst; expect the best; and take what comes."
"To different minds, the same world is a hell, and a heaven."
J. B. Priestley
"Laziness may appear attractive, but work gives satisfaction."
"With the past, I have nothing to do; nor with the future. I live now."
Ralph Waldo Emerson