Alkyl tetralin aldehyde compounds

A compound of the formula:

• ##STR5## wherein R.sup.1 is --CH.sub.3, --CH.sub.2 CH.sub.3, --OCH.sub.3 or --OH,
• R.sup.2 and R.sup.3 are, independently, --H, --CH.sub.3, --CH.sub.2 CH.sub.3, --OCH.sub.3, --OH or --C(O)H,
• R.sup.4 is --H,
• R.sup.5 is --H, --CH.sub.3 or --CH.sub.2 CH.sub.3,
• or R.sup.4 and R.sup.5, taken together, are --(CH.sub.2).sub.2 --,
• R.sup.6 is --CH.sub.3 or --CH.sub.2 CH.sub.3,
• R.sup.7 is --H , --CH.sub.3 or --CH.sub.2 CH.sub.3,
• or R.sup.6 and R.sup.7, taken together, are --(CH.sub.2).sub.3 --,
• R.sup.8 and R.sup.9 are, independently, --H, --CH.sub.3 or --CH.sub.2 CH.sub.3, and
• R.sup.10 is --CH.sub.3,
• provided that
• one of R.sup.2 and R.sup.3 is --C(O)H, and one of R.sup.2 and R.sup.3 is other than --C(O)H,
• (ii) no more than one of R.sup.5 and R.sup.9 is --H,
• (iii) no more than one of R.sup.5, R.sup.6, R.sup.7, R.sup.8 and R.sup.9 is --CH.sub.2 CH.sub.3,
• (iv) when R.sup.1 is --OCH.sub.3, then R.sup.2 and R.sup.3 are other than --H or --OH,
• (v) when R.sup.1 is --OH, then R.sup.2 and R.sup.3 are other than --OH or --OCH.sub.3,
• (vi) when R.sup.1 is --CH.sub.3 or --CH.sub.2 CH.sub.3, then at least one of R.sup.7 and R.sup.8 are H,
• (vii) when R.sup.4 and R.sup.5 taken together are --(CH.sub.2).sub.2 --, then R.sup.1 is --OCH.sub.3 or --OH, R.sup.7 is --H, and R.sup.8 is --H,
• (viii) when R.sup.6 and R.sup.7 taken together are --(CH.sub.2).sub.3 --, then R.sup.1 is --OCH.sub.3 or --OH, and R.sup.8 is --H,
• when R.sup.1 is --CH.sub.3 or --CH.sub.2 CH.sub.3, then one of R.sup.2 and R.sup.3 is --OCH.sub.3 or --OH;
• and
• when R.sup.1 is --OCH.sub.3 or --OH, R.sup.3 is --CH.sub.3 or --CH.sub.2 CH.sub.3, and both R.sup.7 and R.sup.8 are --H, then at least one of R.sup.5, R.sup.6 and R.sup.9 is other than --CH.sub.3.