ring, succinimide ring or the like, and preferably azetidine ring, pyrrolidine ring, piperidine ring, piperazine ring, morpholine ring and thiomorpholine ring.
Sebut saja seperti judul novel dan film Marmut Merah Jambu, Naga Petir, Cinta Dalam Kardus, Kambing Jantan dan Koala Kumal.