(1-Morpholinocyclopentene) 4-(1-Cyclopenten-1-yl)morpholine 4-(1-Cyclopentenyl)morpholine 936-52-7 EINECS 213-316-0 Morpholine, 4-(1-cyclopenten-1-yl)- N-(1-Cyclopenten-1-yl)-morpholine N-(Cyclopent-1-en-1-yl)morpholine NSC 86131