The word Narcisine is misspelled against Narcissine, an adjective meaning "pertaining to Narcissus."
-->
Narcissine has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings narci & ine which should not be misspelled with single 'S'
Wrong Spelling:  narci-s-ine 
Correct Spelling:  narci-ss-ine 
Find more wrongly spelled words of Narcissine to spell it well.