Is there another name for compound "delta-7 sterine", does it exist alone?
"delta-7 sterine" seems to be an adaptation of German term "Sterine" (plural for "Sterin") used by German scientists who elucidated the structures of those steroids using NMR [1].
In English, it seems, the name should be written as Δ⁷–sterol and is not a single compound but a group of compounds (for more info I'd suggest searching Google Scholar).

References


Sucrow, W.; Reimerdes, A. Δ⁷-Sterine Aus Cucurbitaceen. Zeitschrift für Naturforschung B 1967, 23 (1), 42–45. https://doi.org/10.1515/znb-1968-0109. (Open Access)