Lm Alnar - Ktab Mftah Alasrar Fy Kyfyt

However, it is important to note that in mainstream Islamic scholarship (fiqh, tafsir, hadith) or even in the established canon of Sufism or Arabic alchemy/hermeticism. It does not appear in standard bibliographies like Hajji Khalifa's Kashf al-Zunun or in modern university catalogues of Arabic manuscripts.

"The Book of the Key of Secrets on the Method of Gathering/Compressing the Fire."

If you can provide the author's name or a scan of the first page, a more precise identification may be possible.